ICP-MS Determination of 10 Metal Elements in Air of Welding Workplace

ICP-MS was applied to the determination of 10 metal elements, i.e., Mn, Cr, Ni, Cu, Mo, Co, V, W, Pb and Zn, in air of welding workplace. The solid particles in air were collected on filtering membrane and digested with a mixture of nitric acid-hydrogen peroxide (3+2). The sample solution was used for ICP-MS analysis under standard mode, using 175Lu as internal standard. Linearity for the 10 elements was kept between definite mass concentration ranges. Values of detection limits (3S/N) for the 10 elements were found in the range of 0.02-0.48 μg·L-1. Recovery of the method was tested by standard addition method, giving values ranged from 96.2% to 109%. Values of RSDs (n=7) were less than 6.0%.