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Home > Technical Articles > Pb in Children's Jewelry
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Home > Technical Articles > Pb in Children's Jewelry
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CPSC PolicyIn February, 2005, the US Consumer Product Safety Commission (CPSC) announced a new enforcement policy concerning lead (Pb) in children's jewelry. Testing is to be done in two phases, (1) a screening test for total Pb in each component of the jewelry (clasp, chain, etc. tested separately) and (2) an acid leach test. If none of the components of the jewelry contain more than 600 ppm Pb, no further testing or action is taken. Otherwise the acid leach test is conducted on the entire, intact piece of jewelry with a maximum limit of 175 total micrograms. |
CPSC Announcement |
Screening TestThe screening test is designed to measure the total lead (Pb) in each component of jewelry (clasp, chain, beads, even painted coating). A portion of the component is digested in concentrated nitric and hydrochloric acids and analyzed by one of several atomic spectroscopy methods (FAAS, GFAAS, ICP-OES, or ICP-MS). If any component exceeds 600 ppm, the acid leach test should be conducted. |
ICP-MS Plasma |
Acid Leach TestThis test is designed to indicate the exposure to lead that is ingested in the alimentary tract. The entire, intact piece of jewelry is suspended in a 0.07N hydrochloric acid solution at 37oC and shaken for periods of 1, 2, and 3 hours. |
The acid is removed and fresh acid solution added at the end of each period. Each leachate is analyzed separately, and the sum of all acid leachable Pb should be less than 175 micrograms. |
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