【国外标准】 Standard Test Methods for Chemical Analysis of Refined Nickel

4.1 These test methods are primarily intended to test refined nickel metal for compliance with compositional specifications. It is assumed that all who use these test methods will be trained analysts capable of performing common laboratory procedures skillfully and safely. It is expected that the analytical work will be performed in a properly equipped laboratory under appropriate quality control practices.1.1 These test methods apply to the chemical analysis of refined nickel and other forms of metallic nickel having chemical compositions within the following limits:Element Mass Fraction, %   Antimony, less than 0.005Arsenic, less than 0.005Bismuth, less than 0.01Cadmium, less than 0.0025Carbon, max 0.03Cobalt, max 1.00Copper, max 1.00Hydrogen, max 0.003Iron, max 0.15Lead, less than 0.01Manganese, less than 0.20Nickel, min 98.0Nitrogen, less than 0.50Oxygen, less than 0.03Phosphorus, less than 0.005Selenium, less than 0.0010Silicon, less than 0.005Silver, less than 0.01Sulfur, max 0.01Tellurium, less than 0.0010Thallium, less than 0.0010Tin, less than 0.005Zinc, less than 0.0151.2 These test methods may be used to determine the following elements by the methods indicated below:Test Methods Sections   Antimony, Arsenic, Bismuth, Cadmium, Lead, Selenium, Silver, Tellurium, Tin, and Thallium by the Graphite Furnace Atomic Absorption Spectrometric Method 21 – 31   Bismuth, Cadmium, Cobalt, Copper, Iron, Lead, Manganese, Silver, and Zinc by the Flame Atomic Absorption Spectrometric Method 9 – 20   Sulfur by the Methylene Blue Spectrophotometric Method After Generation of Hydrogen Sulfide 32 – 421.3 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 and health practices and determine the applicability of regulatory limitations prior to use. For specific precautions, see Section 6.1.5 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.