Значение и использование

These test methods for the chemical analysis of cadmium are primarily intended to test such material for compliance with compositional specifications in Specification B440. 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 work will be performed in a properly equipped laboratory.

Область применения

1.1 These test methods cover the chemical analysis of cadmium having chemical compositions with the following limits:

ElementComposition, max, % Antimony0.001 Arsenic0.003 Copper0.015 Lead0.025 Silver0.010 Thallium0.003 Tin0.010 Zinc0.035

1.2 The test methods appear in the following order:

Sections Antimony by the Rhodamine B Spectrophotometric Method
[0.0002 % to 0.0010 %]62-72 Arsenic by the Molybdenum Blue Spectrophotometric Method
[0.001 % to 0.005 %]40-50 Copper by the Neocuproine Spectrophotometric Method [0.002 % to 0.030 %] 10-19 Copper, Lead, Silver, and Zinc by the Atomic Absorption Method [0.004 % to 0.02 % Cu, 0.01 % to 0.05 % Pb, 0.004 % to 0.02 % Ag
and 0.01 % to 0.05 % Zn]51-61 Lead by the Dithizone Spectrophotometric Method [0.001 % to 0.05 %]20-29 Thallium by the Rhodamine B Spectrophotometric Method
[0.0003 % to 0.005%]30-39 Tin by the 8-Quinolinol Spectrophotometric Method [0.0025 % to 0.0150 %]73-82

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 precautionary information is given in Section 6, 25.8, 35.2, and 35.3.