This specification covers detergent feeders, rinse additive feeders, and sanitizing agent feeders intended to automatically maintain the concentration of additives in the wash, recirculated rinse, or non-recirculated rinse water of commercial spray- type dish-washing and glass-washing machines. Detergent, rinse additive, and sanitizing agent feeders shall be of the following types and styles: Types I, II, III, IV, V, and VI; and Style I; II; III; IV; V; and VI. Materials used shall be free from defects that would adversely affect the performance or maintainability of individual components or of the overall assembly. The feeder shall be complete so that when connected to the specified source of power (electrical or water, or both), the unit can be used for its intended function. Feeders shall be tested in accordance with specified requirements.1.1 This specification covers detergent feeders, rinse additive feeders, and sanitizing agent feeders intended to automatically maintain the concentration of additives in the wash, recirculated rinse, or non-recirculated rinse water of commercial spray-type dishwashing and glasswashing machines.1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.1.3 The following safety hazards caveat pertains only to the test methods portion, Section 10, of this specification: 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

This test method covers the determination of retained blowing agent in extruded polystyrene foam. The internal standard preparation procedures of the material are presented in details. The procedures for determination of retained blowing agent in extruded polyester foam are presented in details.1.1 This test method covers the determination of retained blowing agent in extruded polystyrene foam.1.2 This test method applies to organic blowing agents which lend themselves to a convenient analysis by gas chromatography. The method is not applicable to blowing agents such as nitrogen, carbon dioxide, or water.1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.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.NOTE 1: There is no known ISO equivalent to this standard.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

1 Scope 1.1 This International Standard specifies general requirements for the characterization of a sterilizing agent, and for the development, validation and routing control of a sterilization process for medical devices. 1.2 This International

定价： 910元 / 折扣价： 774 元

定价： 910元 / 折扣价： 774 元

5.1 This method can be used to evaluate effectiveness of incorporated/bound antimicrobials in hydrophobic materials such as plastics, epoxy resins, as well as other hard surfaces.5.2 The aqueous based bacterial inoculum remains in close, uniform contact in a “pseudo-biofilm” state with the treated material. The percent reduction in the surviving populations of challenge bacterial cells at 24 h versus those recovered from a non-treated control is determined.5.3 The hydrophobic substrate may be repeatedly tested over time for assessment of persistent antimicrobial activity.1.1 This test method is designed to evaluate (quantitatively) the antimicrobial effectiveness of agents incorporated or bound into or onto mainly flat (two dimensional) hydrophobic or polymeric surfaces. The method focuses primarily on assessing antibacterial activity; however, other microorganisms such as yeast and fungal conidia may be tested using this method.1.2 The vehicle for the inoculum is an agar slurry which reduces the surface tension of the saline inoculum carrier and allows formation of a “pseudo-biofilm,” providing more even contact of the inoculum with the test surface.NOTE 1: This test method facilitates the testing of hydrophobic surfaces by utilizing cells held in an agar slurry matrix. This test method, as written, is inappropriate to determine efficacy against biofilm cells, which are different both genetically and metabolically than planktonic cells used in this test.1.3 This method can confirm the presence of antimicrobial activity in plastics or hydrophobic surfaces and allows determination of quantitative differences in antimicrobial activity between untreated plastics or polymers and those with bound or incorporated low water-soluble antimicrobial agents. Comparisons between the numbers of survivors on preservative-treated and control hydrophobic surfaces may also be made.1.4 The procedure also permits determination of “shelf-life” or long term durability of an antimicrobial treatment which may be achieved through testing both non-washed and washed samples over a time span.1.5 Knowledge of microbiological techniques is required for these procedures.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.

定价： 515元 / 折扣价： 438 元 加购物车