1.1.1. This method describes the collection and analysis of airborne metal and metalloid particulates from solder operations in industry. Time Weighted Average (TWA) air samples are collected using personal sampling pumps and

mixed-cellulose ester (MCE) filters. Analysis is by Inductively Coupled Plasma-Atomic Emission Spectroscopy (ICP-AES). Bulk and wipe samples can also be collected and analyzed by this method.

1.1.2. This method provides rapid simultaneous analysis and data reduction for a wide range of elements, eliminating the necessity of separate analyses by conventional atomic absorption techniques.

1.1.3. This method was validated for 8 elements (Ag, Be, Cd, Cu, Pb, Sb, Sn, and Zn). A total of 21 elements are analyzed, but 13 of these are determined for screening purposes only (Al, As, Ca, Co, Cr, Fe, Ni, Mg, Mn, Mo, Se, Si, and V). Other elements can be added to or subtracted from the method. The capability for expanding the analysis to other elements is dependent on laboratory instrumentation, and element solubility and stability in the acid matrix used for digestion.

1.1.4. The elements validated are those commonly found in solders or soldering operations. The acid matrices used for sample digestion (4:1 ratio of HCl:HNO₃) and dilution (32% HCl/4% HNO₃) were selected to ensure solubility of the eight elements.