定价： 78元 / 折扣价： 67 元 加购物车

定价： 78元 / 折扣价： 67 元 加购物车

定价： 260元 / 折扣价： 221 元 加购物车

1.1 These test methods cover the chemical analysis of ferromanganese having chemical compositions within the following limits:ElementConcentration, %Arsenic0.30 maxCarbon7.50 maxChromium0.50 maxLead0.050 maxManganese16.0 to 90.0Phosphorus0.35 maxSilicon7.00 maxSulfur0.050 maxTin0.020 max1.2 The test methods in this standard are contained in the sections indicated below:SectionsArsenic by the Molybdenum Blue Photometric Method (0.002to 0.06 %) Lead by the Dithizone Photometric Method (0.004 to 0.01 %)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. Specific hazard statements are given in Section 5 and in special warning paragraphs throughout.

定价： 0元 / 折扣价： 0 元

1.1 These test methods cover the chemical analysis of silicomanganese and ferrosilicon manganese having chemical compositions within the following limits:ElementConcentration, %Arsenic0.10 maxCarbon3.0 maxChromium0.50 maxLead0.030 maxManganese50.0 to 68.0Molybdenum0.10 maxNickel0.20 maxPhosphorus0.20 maxSilicon35.0 maxSulfur0.04 maxTin0.010 max1.2 The test methods in this standard are contained in the sections indicated below:SectionsArsenic by the Molybdenum Blue Photometric Method (0.002to 0.06 %) Lead by the Dithizone Photometric Method (0.02 to 0.05 %)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. Specific hazards statements are given in Section 5 and in special warning paragraphs throughout these test methods.

定价： 0元 / 折扣价： 0 元

定价： 156元 / 折扣价： 133 元

定价： 260元 / 折扣价： 221 元

1.1 This test method is intended for testing batches of concentrated ammoniacal copper zinc arsenate (ACZA) solution, prepared by air-oxidation of trivalent arsenic. The test method provides a means of confirming that oxidation has been completed and that at least 99.5 % of the arsenic has been oxidized. The sample for testing should contain 100 ± 20 mg of potential As2 O5. A200-mL aliquot of a concentrate containing 8 to 12 % of preservative oxides is suitable.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 and health practices and determine the applicability of regulatory limitations prior to use.

定价： 0元 / 折扣价： 0 元

Arsenic compounds are suspected to cause corrosion in some materials used in UF6 handling equipment. Arsenic originates as a contaminant in fluorspar (CaF2) used to produce anhydrous hydrogen fluoride which is used subsequently in the production of UF 6.These test methods are used to measure the arsenic content in UO2F2 solutions prepared from the hydrolysis of UF6 for determination of conformance to Specification C 787.1.1 These test methods are applicable to the determination of total arsenic in uranium hexafluoride (UF6) by atomic absorption spectrometry. Two test methods are given: Test Method A—Arsine Generation-Atomic Absorption (Sections 5-10), and Test Method B—Graphite Furnace Atomic Absorption (Appendix X1).1.2 The test methods are equivalent. The limit of detection for each test method is 0.1 μg As/g U when using a sample containing 0.5 to 1.0 g U. Test Method B does not have the complete collection details for precision and bias data thus the method appears as an appendix.1.3 Test Method A covers the measurement of arsenic in uranyl fluoride (UO2F2) solutions by converting arsenic to arsine and measuring the arsine vapor by flame atomic absorption spectrometry.1.4 Test Method B utilizes a solvent extraction to remove the uranium from the UO2F2 solution prior to measurement of the arsenic by graphite furnace atomic absorption spectrometry.1.5 Both insoluble and soluble arsenic are measured when UF6 is prepared according to Test Method C 761.1.6 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 and health practices and determine the applicability of regulatory limitations prior to use.

定价： 0元 / 折扣价： 0 元

4.1 Herbicides, insecticides, and many industrial effluents contain arsenic and are potential sources of water pollution. Arsenic is significant because of its adverse physiological effects on humans.1.1 These test methods2 cover the photometric and atomic absorption determination of arsenic in most waters and wastewaters. Three test methods are given as follows: ConcentrationRange SectionsTest Method A—Silver Diethyldithio- carbamate Colorimetric 5 μg/L to 250 μg/L  7 to 16Test Method B—Atomic Absorption, Hydride Generation 1 μg/L to 20 μg/L 17 to 26Test Method C—Atomic Absorption, Graphite Furnace 5 μg/L to 100 μg/L 27 to 361.2 The analyst should direct attention to the precision and bias statements for each test method. It is the user's responsibility to ensure the validity of these test methods for waters of untested matrices.1.3 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.1.4 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. For specific hazard statements, see 11.1 and 20.2.1.5 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： 646元 / 折扣价： 550 元 加购物车

The permissible level of toxic elements in certain coatings is specified by governmental regulatory agencies. This test method provides a documented procedure for determining low concentrations of arsenic present in whole paint to determine compliance.1.1 This test method covers the determination of less than 0.5 % arsenic in whole paint.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 whoever uses this standard to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

定价： 0元 / 折扣价： 0 元

4.1 This test method permits measurement of the total mass fraction of arsenic and selenium in coal for the purpose of evaluating these elements where they can be of concern, for example, in coal combustion. When coal samples are prepared for analysis in accordance with this test method, the arsenic and selenium are quantitatively retained and are representative of the total mass fraction in the coal.1.1 This test method2 covers the determination of total arsenic in the range of 0.7 ug/g to 12 ug/g and selenium in the range of 0.6 ug/g to 5 ug/g in coal.1.2 Units—The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units 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： 590元 / 折扣价： 502 元 加购物车