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STANDARD OPERATING PROCEDURES FOR LEAD IN PAINT BY HOTPLATE - OR MICROWAVE-BASED ACID DIGESTIONS AND ATOMIC ABSORPTION OR INDUCTIVELY COUPLED PLASMA EMISSION SPECTROMETRY
Citation:
Binstock, D., D. Hardison, P. Grohse, AND W. Gutknecht. STANDARD OPERATING PROCEDURES FOR LEAD IN PAINT BY HOTPLATE - OR MICROWAVE-BASED ACID DIGESTIONS AND ATOMIC ABSORPTION OR INDUCTIVELY COUPLED PLASMA EMISSION SPECTROMETRY. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/8-91/213.
Description:
Two extraction and two quantitation procedures are given for the quantative determination of lead in paints along with recommended QA/QC practices. he procedures were evaluated with 0.10 g samples of synthetic or old real-world paints that had been crushed or pulverized. oth extraction procedures gave recoveries greater than 90%. he hotplate boiling HNO3/H2O2 procedure combined with atomic absorption spectrometry (AAS) analysis yielded precisions of 4 to 8% RSD for samples greater than 1000 ug Pb/g, with a linear sample analysis range of 1000 to 20,000 ug Pb/g. nductively coupled argon plasma (ICP) analysis gave precisions of 6 to 10% RSD for samples above 300 ug Pb/g and a linear analysis range of 100 to 200,000 ug Pb/g. sing the microwave HNO3/HCL extraction procedure, AAS had precisions of 2 to 4% RSD for samples above 1000 ug Pb/g and an analysis range of 200 to 4,000 ug Pb/g, and ICP had precisions of 2 to 6% RSD for samples above 300 ug Pb/g with an analysis range of 20 to 40,000 ug Pb/g.