National Institute for Occupational Safety and Health

“ The working range of this method is 0.005 to 2.0 mg/m3 for each element in a 500-L air sample. This is simultaneous elemental analysis, not compound specific. Verify that the types of compounds in the samples are soluble with the ashing procedure selected. This method does not digest PVC filters completely.
INTERFERENCES: Spectral interferences are the primary interferences encountered in ICP-AES analysis. These are minimized by judicious wavelength selection, interelement correction factors and background correction [1-4] . ”

“ Do not exceed a filter loading of approximately 2 mg total dust.
SAMPLE PREPARATION: 3. Open the cassette filter holders and transfer the samples and blanks to clean beakers. 4. Add 5 mL ashing acid. Cover with a watchglass. Let stand 30 min at room tem perature. NOTE: Start a reagent blank at this step. 5. Heat on hotplate (120 °C) until ca. 0.5 mL remains. NOT E 1: Reco very of lead from some paint matrices may require other digestion tech niqu es. See Method 7082 (Lead by Flame AA S) for an alternative hotplate digestion procedure or Method 730 2 for a m icrow ave diges tion pro ced ure. ”

“ Ag, K, Li, Mg, Mn, Ni, P, Pb, Se, Sr, Tl, V, Y, Zn, Sc c. Mo, Sb, Sn, Te, Ti, W , Zr d. Acid blank 13. Analyze a standard for every ten samples. 14. Check recoveries with at least two spiked media blanks per ten samples. ”