Determination of Cr, Ni, Cu, As and Pb in Cigarette Filter Tow by ICP-MS

The Cr, Ni, Cu, As, Se, Cd and Pb in AC and PP tow samples were digested by HNO3/H2O2 with four steps of different microwave intensities and durations, and then determined by ICP-MS. The duration for the fourth step of digestion was optimized. The results showed that the optimal condition for the fourth step of digestion was 190℃ for 20 minutes. The recoveries of the elements were in the range of 86.38% to 117.2% with RSD of 25% and limits of detection of < 25.20 to 245.1ng/L. Se and Cd were not detectable in the two tow samples.