| Twenty kinds of elements such as Be, V, Cr, Mn, Co, Ni, Cu, Zn, As, Se, Mo, Ag, Cd, Sb, Ba, Hg, Tl, Pb, Th and U in wastewater were simultaneously determined by inductively coupled plasma mass spectrometry with microwave digestion. After test results comparison of 5 digestion systems for the wastewater, HNO3 H2O2 system was finally taken for the determination. The calibration curves showed a good linearity from 5.00 μg/L to 500 μg/L for Be, V, Cr, Mn, Co, Ni, Cu, Zn, As, Se, Mo, Ag, Cd, Sb, Ba, Tl, Pb, Th and U, and from 0.050 μg/L to 2.00 μg/L for Hg. Detection limits ranged from 0.01 μg/L to 0.2 μg/L. Test results of national standard material meet the requirements. RSD of duplicated wastewater samples test ranged from 2.6% to 6.5%. Spiked recoveries ranged from 84% to 110%. |
