5.1 This practice is intended for use by those in the waste management industries to aid in describing the physical characteristics of waste.5.2 This practice has two uses. One is to visually screen wastes being received at the laboratory to identify discrepancies between the waste, manifest, and historical descriptions. The other use is to visually examine soil and water samples while they are being collected. This information, along with professional judgment during sample collection, can be used to increase the knowledge of the site contamination by increasing or reducing the number of samples collected based on visible indication of contamination or lack of visible indication of contamination. For example, if a soil or groundwater sample is collected “up gradient” of the area of known or suspected contamination to obtain site background concentrations, and the sample appears contaminated, the up-gradient area can be relocated during that sampling event. Visual observation could also show that the sampling parameters need to be increased or decreased. This may reduce or eliminate the need for additional sampling trips to the field.1.1 This practice is used to identify wastes by describing certain physical properties. It has been developed as a rapid but effective means for visually screening wastes when received in the laboratory or during collection at the sampling site.1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Specific hazard and warning information is given in 8.1.6.1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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This specification covers the minimum requirements for information that shall be provided by the manufacturer or seller of new amusement rides or devices as a part of the initial sale or transfer to the first end user. It does not apply to the sale or transfer of used amusement rides and devices. A manufacturer issued information plate, printed in English, shall be permanently affixed to the ride or device in a visible location and shall be designed to remain legible for the expected life of the ride or device. The plate shall include, but not be restricted to, all applicable items such as ride serial number, ride name and manufacturer, ride model number, date of manufacture, ride speed, travel direction, passenger capacity by weight, and passenger capacity by number. Other information required to be provided by manufacturer shall include the following: ride duration, recommended balance of passenger loading or unloading, environmental restrictions, recommended passenger restrictions, electrical power requirements, mechanical power requirements, water flow, static information, dynamic information, trailering information, fastener schedule, load distribution per footing, and elements and structures.1.1 This specification covers the minimum requirements for information that shall be provided by the manufacturer or seller of new amusement rides or devices as a part of the initial sale or transfer to the first end user.1.2 This specification does not apply to the sale or transfer of used amusement rides and devices.

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4.1 This practice is designed for researchers, applicators, and end users of pesticides where one or more ingredients are being mixed into an aqueous spray system. The practice is useful in determining physical compatibility of aqueous spray mixtures of pesticides and/or fertilizers.4.2 The practice is not designed to determine physical compatibility of non-aqueous based spray mixtures.4.3 The results or the testing should be used to determine the compatibility of the mixture ingredients in dynamic applications. Interpolation of static results to the expectations of the results of this test is not encouraged.1.1 This practice describes the method for the evaluation of the physical compatibility and stability of pesticide tank mixtures diluted for aqueous application. This practice may also be adapted to use with liquid fertilizers in replacement of the water diluent.1.2 Tank mix compatibility can be affected by many variables. Care should be taken to duplicate test conditions. This practice addresses the standard variables such as time, temperature, water hardness, method of agitation, and degree of agitation.1.3 Compatibility is complex and can be affected by other variables such as order of addition, pH of the dilution water, pumping shear, etc. Under the parameters of this practice, the results will define whether the pesticide mixture is or is not compatible in the laboratory. Compatibility or incompatibility should be confirmed under field spray conditions.1.4 Proper safety and hygiene precautions must be taken when working with pesticide formulations to prevent skin or eye contact, vapor inhalation, and environmental contamination.1.5 Read and follow all handling instructions for the specific formulation and conduct the test in accordance with good laboratory practice.1.6 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.1.7 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.8 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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5.1 High quality physical product standards for color or appearance are the keystone of a successful color control program. Standards are often grouped into three major categories: product standards, intermediate production control standards, and instrument standards. This guide deals only with physical product standards. Some instrument-based color control programs use “numerical standards,” derived from instrumental measurements of a physical product standard.AbstractThis guide covers three levels of physical product standards (preparation, maintenance, and distribution) for color or geometric appearance, or both, of coatings commonly used in the coatings industry. Described here is terminology to describe each level, and techniques for generating and caring for standards. Product standards are the only standards by which products should be accepted or rejected for color or appearance. A master standard is generated from the concept color submitted by the customer. Duplicate master standards, when needed, are generated from the master standard. Working standards are generated from a duplicate master standard. They are used in the laboratory or on the production line to accept or reject the color or appearance of coatings. After initial generation, product standards must be maintained to ensure they remain valid. This guide considers the characteristics of product standards, factors to be considered in their creation, and factors to be considered in their replacement.1.1 This guide covers three levels of physical product standards for color or appearance, or both, commonly used in the coatings industry, provides terminology to describe each level, and describes techniques for generating and caring for standards.1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 515元 / 折扣价： 438 元 加购物车

Environmental performance test values for smooth-wall, coilable, medium density and high density polyethylene (MDPE and HDPE) conduit (duct) for preassembled wire and cable may provide data for research and development, engineering design, quality control, and acceptance or rejection under specifications. 1.1 These test methods cover procedures for determining the environmental performance properties of smooth-wall, coilable, medium-density and high-density polyethylene (MDPE and HDPE) conduit (duct) for preassembled wire and cable. 1.2 Whenever two sets of values are presented, in different units, the values in the first set are the standard, while those in parentheses are for information only. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

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4.1 A major concern for administrative officials is the security of barriers used in detention/correctional facilities. These test methods are designed to aid in identifying levels of physical security for walls which enclose or separate secure areas. This does not apply to the passage of contraband.4.2 These test methods are not intended to provide a measure of resistance for a wall subjected to attack by corrosive agents, by high-powered rifles, explosives, sawing, or other such methods. These test methods are intended to evaluate the resistance of a wall to violent attacks by sustained manpower using battering devices, such as benches, bunks, or tables, and by handguns up to and including .44 magnum. Attacks from the outside and fire resistance ratings are not addressed in this standard.4.3 The primary purpose or result of these test methods is to approximate the levels of abuse to which walls will potentially be subjected in the field. The desired result of its use is to help provide assurance of protection to the public, to facility administrative personnel, and to the inmates themselves.4.4 It is recommended that detention/correctional facility administration provide adequate training, supervision, and preventative maintenance programs to enable walls to function as intended throughout the expected service life.1.1 These test methods cover requirements for simulated service tests and testing equipment for determining the performance characteristics of walls designed to incarcerate inmates in detention and correctional institutions. The testing equipment provides for the setup and testing of two sample fixed barriers side-by-side, one with no openings and one equipped with a representative penetration in accordance with the American Correctional Association (ACA) standard for clear view area of 3 ft2 (0.279 m2), 12 in. (305 mm) wide by 36 in. (914 mm) high.1.2 It is the intent of these test methods to help ensure that detention security walls perform at or above minimum acceptable levels to control passage of unauthorized or secure areas, to confine inmates, to delay and frustrate escape attempts, and to resist vandalism. It is recognized that in order to meet the intent of these test methods, opening assemblies within these walls must be compatible with the level of performance required by: Test Methods F1450, F1592, and F1643.1.3 These test methods apply to walls enclosing or separating secure areas of detention/correctional facilities.1.4 The values stated in inch-pound units are to be regarded as the standard. The SI values given in parentheses are approximate and for information only.1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 590元 / 折扣价： 502 元 加购物车

4.1 Vapor pressure is an important specification property of commercial propane, special duty propane, propane/butane mixtures, and commercial butane that assures adequate vaporization, safety, and compatibility with commercial appliances. Relative density, while not a specification criterion, is necessary for determination of filling densities and custody transfer. The motor octane number (MON) is useful in determining the products' suitability as a fuel for internal combustion engines.1.1 This practice covers, by compositional analysis, the approximate determination of the following physical characteristics of commercial propane, special-duty propane, commercial propane/butane mixtures, and commercial butane (covered by Specification D1835): vapor pressure, relative density, and motor octane number (MON).1.1.1 This practice is not applicable to any product exceeding specifications for nonvolatile residues. (See Test Method D2158.)1.1.2 For calculating motor octane number, this practice is applicable only to mixtures containing 20 % or less of propene.1.1.3 For calculated motor octane number, this practice is based on mixtures containing only components shown in Table 1.1.2 The values stated in SI units are to be regarded as standard.1.2.1 Exceptions: 1.2.1.1 Non-SI units in parentheses are given for information only.1.2.1.2 Motor octane number and relative density are given in MON numbers and dimensionless units, respectively.1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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4.1 Apparent density as determined by this test method is a basic material property of importance in manufacturing and application of anode and cathode carbon.4.2 This test method can be used for quality and process control, material characterization and description, and other purposes.1.1 This test method covers the determination of the apparent density of core samples from manufactured articles of anode and cathode carbon used by the aluminum industry in the production of aluminum.1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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7.1 The particle size distribution of powdered ion exchange resins and, more importantly, the derived parameters of mean particle size and percent above and below specified size limits are useful for determining batch to batch variations and, in some cases, can be related to certain aspects of product performance.7.2 Although automatic multichannel particle size analyzers, of the type described in Section 9, yield information on the entire distribution of sizes present in a given sample, it has been found that, for this application, the numerical value of three derived parameters may adequately describe the particle size characteristics of the samples: the mean particle diameter (in micrometres), the percent of the sample that falls below some size limit, and the percent of the sample that falls above some size limit.1.1 These test methods cover the determination of the physical and chemical properties of powdered ion exchange resins and are intended for use in testing new materials. The following test methods are included:  SectionsTest Method A—Particle Size Distribution 5 to 15Test Method B—Solids Content 16 to 231.2 The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to inch-pound units that are provided for information only and are not considered standard.1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health and environmental practices and determine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 515元 / 折扣价： 438 元 加购物车

2.1 This practice is intended for use by any technical investigator when investigating an incident that can be reasonably expected to be the subject of litigation. The intent is to obtain sufficient information and physical items to identify evidence associated with the incident and to preserve it for analysis.2.2 The quality of evidence may change with time, therefore, special effort should be taken to capture and preserve evidence in an expeditious manner. This practice sets forth guidelines for the collection and preservation of evidence for further analysis.2.3 Evidence that has been collected and preserved is identified with, and traceable to, the incident. This practice sets forth guidelines for such procedures.1.1 This practice covers guidelines for the collection and preservation of information and physical items by any technical investigator pertaining to an incident that can be reasonably expected to be the subject of litigation.1.2 This practice describes generally accepted professional principles and operations, although the facts and issues of each situation require consideration, and frequently involve matters not expressly dealt with herein. Deviations from this practice should be based on specific articulable circumstances.1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 515元 / 折扣价： 438 元 加购物车

4.1 The purpose of this practice is to provide test methods and performance criteria involving encapsulants for surfacing material on an asbestos abatement project in accordance with Practice E1368, including the application of encapsulants to the surfacing material as an abatement measure and the removal of existing encapsulated surfacing material.4.1.1 Abatement projects involving application of encapsulants require coverage, penetration, and cohesion/adhesion tests to determine encapsulation requirements during project design, on test patches, and at conclusion of the project to determine completeness of abatement.4.1.2 Removal projects requires penetration tests during project design on test patches to determine thicknesses of encapsulated and un-encapsulated surfacing material.4.2 The test methods and performance criteria described in this practice may also be used during a Project Design Survey in accordance with Practice E2356 to provide information for preparing the plans and specifications for applying or removing the encapsulated surfacing material.4.3 Asbestos-containing surfacing materials installed in buildings may include fireproofing, acoustical and decorative plaster, and soundproofing. Properties not directly addressed in this practice may be important and appropriate test methods should be considered. See Test Methods E84, E119, and E605, and 1-GP-205M2003.4.4 The test methods described in this practice are designed to (1) determine the depth of penetration, or lack thereof, of the encapsulant into the matrix of the surfacing material, (2) determine the coverage of the encapsulant on the surfacing material, and (3) to determine the adhesive and cohesive properties of the encapsulated surfacing material.4.5 Compliance with the acceptance criteria in this practice and with referenced specifications does not guarantee that the abatement project will pass the visual inspection for completeness of clean-up in Practice E1368, or that the project will pass final air sampling for clearance, as other factors besides encapsulant performance affect these outcomes.1.1 This practice covers encapsulants intended to reduce or eliminate the release of asbestos fibers from a matrix of friable spray- or trowel-applied asbestos-containing surfacing material.1.2 This practice includes a series of determinations to be conducted in the field on asbestos abatement projects for which encapsulation is being considered or has been performed.1.3 This practice is to be used to determine the appropriateness of encapsulation as an abatement measure in accordance with Practice E1368, as part of a Project Design Survey in accordance with Practice E2356, and to demonstrate completeness of abatement in accordance with Practice E1368. Performance of the encapsulated surfacing material for other purposes is not within the scope of this practice. Use Test Methods E84, E119, and E605 to determine other properties of the material.1.4 The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to inch-pound units that are provided for information only and are not considered standard.1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.6 Warning—Asbestos fibers are acknowledged carcinogens. Breathing asbestos fibers can result in disease of the lungs including asbestosis, lung cancer, and mesothelioma.2 Precautions in this standard practice should be taken to avoid creating and breathing airborne particles from materials known or suspected to contain asbestos. See 2.3 for regulatory requirements addressing asbestos.1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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7.1 The ionic form of an ion-exchange material affects both its equivalent mass and its equilibrium water content. These in turn influence the numerical values obtained in exchange capacity determinations, in density measurements, and in the size of the particles. To provide a uniform basis for comparison, therefore, the sample should be converted to a known ionic form before analysis. This procedure provides for the conversion of cation-exchange materials to the sodium form and anion-exchange materials to the chloride form prior to analysis. These forms are chosen since they permit samples to be weighed and dried without concern for air contamination or decomposition. If other ionic forms are used this fact should be noted in reporting the results.1.1 These test methods cover the determination of the physical and chemical properties of ion-exchange resins when used for the treatment of water. They are intended for use in testing both new and used materials. The following thirteen test methods are included:  SectionsTest Practice A—Pretreatment  6 – 10Test Method B—Water Retention Capacity 11 – 18Test Method C—Backwashed and Settled Density 19 – 26Test Method D—Particle Size Distribution 27 – 35Test Method E—Salt-Splitting Capacity of Cation-Exchange Resins 36 – 45Test Method F—Total Capacity of Cation-Exchange Resins 46 – 55Test Method G—Percent Regeneration of Hydrogen-Form Cation-Exchange Resins 56 – 64Test Method H—Total and Salt-Splitting Capacity of Anion-Exchange Resins 65 – 73Test Practice I—Percent Regeneration of Anion Exchange Resins 74 – 82Test Practice J—Ionic Chloride Content of Anion-Exchange Resins 83 – 90Test Method K—Carbonate Content of Anion-Exchange Resins 91 – 99Test Method L—Sulfate Content of Anion Exchange Resins 100 – 108Test Practice M—Total Anion Capacity of Anion-Exchange Resins  109 – 1171.2 The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to inch-pound units that are provided for information only and are not considered standard.1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health and environmental practices and determine the applicability of regulatory limitations prior to use. Specific precautionary statements are given in Section 10.8.1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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5.1 There is no consistent method for the physical placement of an identifying label on equipment in the possession of an entity.5.2 This practice is intended to expedite and improve the physical inventory and self-assessment processes and other occasions in which the instant identification of equipment is needed for purposes of control, management, or determining ownership, or a combination thereof.5.3 The further intent of this practice is to reduce the administrative costs associated with activities requiring equipment identification, that is, physical inventory, self-assessments, and audits and to supplement Practice E2279, Practice E2452, and MIL STD 130.1.1 This practice is for supplemental identification labels assigned by an entity and affixed to equipment to permit control.1.2 Identifying labels include, but are not limited to, removable tags, bands, and plates.1.3 This practice is not intended for material or manufacturer’s warranties.1.4 This practice is not intended for markings of original equipment manufacturers (OEMs).1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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5.1 A nano-object is an individual, well-defined, and separable piece of a nanomaterial; in practice, nanomaterials used in research, products, testing, and other uses are almost always collections of nano-objects. Individual nano-objects and collections of nano-objects are the two major types of nanomaterials in use. The description of a collection of nano-objects is covered in this guide. The description of an individual nano-object is covered in Guide E3144. Nano-objects, individually or as a collection, are often embedded in other materials for commercial, research, and other uses. These embedded nanomaterials can be described using the information categories and descriptors included in these guides.5.2 Nanomaterials are of growing importance in research and commerce, and data on their physical and chemical characteristics are critical to predict performance, to transact commercial activities, to assess their potential for harm to human and animal health and the environment in general, and to support regulations that affect their use. A collection of nano-objects is the predominant type of nanomaterial tested and used in commerce.5.3 The four types of data and information used to describe a collection of nano-objects are: physical and chemical characteristics; production; specifications; and general identifiers (names and classifications), as shown in Fig. 1.FIG. 1 Data and Information Types Necessary to Describe a Collection of Nano-ObjectsUsed with permission of CODATA from “Uniform Description System for Materials on the Nanoscale,” Version 2.0, http://doi.org/10.5281/zenodo.56720.5.4 This guide deals solely with data and information to describe the physical and chemical characterization of a collection of individual nano-objects.NOTE 2: Other guides and documents (see Section 2, Referenced Documents) deal with the data and information for production, specifications, and general identifiers (names and classifications).NOTE 3: Specifications are formal or informal documents that provide guidance on specifying the composition, structure, or any other aspect of a nano-object or a collection of nano-objects.5.5 In a practical sense, the amount of data and information reported to describe the physical and chemical characteristics of a collection of nano-objects differs widely depending on who is reporting and the reason they are reporting. Researchers examining specific aspects of a collection of nano-objects can choose to report a limited subset of characteristics. For example, a test report on the potential toxicity of a collection of nano-objects can choose to report numerous characteristics. This guide supports both limited and complete reporting of characteristics enumerated herein.5.6 The science of characterizing collections of nano-objects is still evolving. Some information categories will require additional descriptors as new knowledge is developed. Some descriptors can become obsolete. Users should consult the latest guide for the most complete recommendations.5.7 The technology for collecting, storing, analyzing, and disseminating scientific and technical data continues to evolve, and tools such as ontologies, database schemas, data repository reporting requirements, and data recoding formats are evolving similarly. This guide provides a clear, English language definition of information categories and descriptors used to describe a collection of nano-objects that can be used in these and other similar tools.5.8 A collection of nano-objects has properties and functionalities that are measured under specific measurement conditions. The description of a collection of nano-objects requires data and information on its properties as well as on the conditions under which those properties were measured, as shown in Fig. 2.FIG. 2 Data and Information Components Necessary to Describe a Nanomaterial and Its PropertiesUsed with permission of CODATA from “Uniform Description System for Materials on the Nanoscale,” Version 2.0, http://doi.org/10.5281/zenodo.56720.5.9 The characteristics of a collection of nano-objects defined in this guide address the important physical and chemical properties of that collection. Because the techniques and instruments used to measure these properties can greatly influence the property value, when available, the measurement result being used should include as much information as possible about the measurement conditions.5.10 This guide is designed for use whenever the data and information on the physical and chemical characteristics of a collection of nano-objects are reported.1.1 This guide provides guidelines for a description system to report the physical and chemical characteristics of collections of nano-objects. It establishes information categories and descriptors useful in describing collections of nano-objects uniquely and such that the equivalency of two or more collections of nano-objects can be determined according to specific criteria.1.2 This guide is designed to be directly applicable to reporting the physical and chemical characteristics of collections of nano-objects in most circumstances, including, but not limited to, reporting original research results in the archival literature, developing ontologies, database schemas, data repositories, and data reporting formats, specifying regulations, and enabling commercial activity.1.3 This guide is applicable to collections of naturally occurring, engineered, and manufactured nano-objects.1.4 One goal of the guide is to help ensure that when measurement results are reported, they are reported uniformly.1.5 A second goal of the guide is to encourage reports on the properties and functionalities of a collection of nano-objects to include as much detail as possible about the physical and chemical characteristics of that collection so it is uniquely specified.1.6 This guide does not cover the chemical reactions or reactivity of a collection of nano-objects.1.7 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.1.8 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.9 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 590元 / 折扣价： 502 元 加购物车

5.1 Both suppliers and users of metals can benefit from knowledge of the surface area of these materials. Results of many intermediate and final processing steps are controlled by, or related to, specific surface area of the metal. The performance of many sintered or cast metal structures may be predicted from the specific surface area of the starting metal powder, or all or a portion of the finished piece.1.1 This test method covers determination of surface area of metal powders. The test method specifies general procedures that are applicable to many commercial physical adsorption instruments. The method provides specific sample outgassing procedures for listed materials. It includes additional general outgassing instructions for other metals. The multipoint equation of Brunauer, Emmett, and Teller (BET),2 along with the single point approximation of the BET equation, forms the basis for all calculations.1.2 This test method does not include all existing procedures appropriate for outgassing metallic materials. The procedures included provided acceptable results for samples analyzed during interlaboratory testing. The investigator shall determine the appropriateness of listed procedures.1.3 Units—The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.1.3.1 State all numerical values in terms of SI units, unless specific instrumentation software reports surface area using alternate units. In this case, present both reported and equivalent SI units in the final written report. Many instruments report surface area as m2/g, instead of using correct SI units (m2/kg).1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 590元 / 折扣价： 502 元 加购物车