CPSC-CH-E1001-8.1(2010.06.21)Test Method: CPSC-CH-E1001-8.1Standard Operating Procedure for Determining Total Lead (Pb) in Metal Children’s Products (including Children’s Metal Jewelry), Revision
June 21, 2010*
This document provides detailed information on test methodologies that will be used by the U.S. Consumer Product Safety Commission’s testing laboratory (LSC) in the analysis of children’s metal products for lead (Pb) content. The set of methods described are used to determine the total lead content of metal items such as but not limited to children’s metal jewelry. This version replaces the previously issued Test Method CPSC-CH-E1001-08. The changes are mainly editorial in nature.
CPSC staff has concluded that these test methods are sufficient to determine lead content in most metal consumer products. Adjustments may be necessary for products made from certain alloys, and should be based on sound chemistry knowledge and appropriate acids for the matrix. Test methods selected shall be those that best demonstrate they can achieve total digestion of the sample material being analyzed. Test methods shall not be used if they are inconsistent with the specified application of the test method or do not demonstrate the best performance or proficiency for achieving total digestion of the sample material.
The methods apply to metal and metal alloy components and have not been recommended by CPSC staff for other materials that will not dissolve under the conditions specified below, or when combined with the specified acid(s) results in an inappropriate combination of materials that would not be consistent with safe laboratory practices.
The general approach is to grind any accessible component part of a sample to a powder, digest completely in a combination of hot concentrated nitric and hydrochloric acids and analyze by Inductively Coupled Plasma – Optical Emission Spectroscopy (ICP-OES).
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