Determination of Six Heavy Metal Elements Such as Co in Solid Waste by ICP-MS

Abstract

Soil In this paper, tetraacid system -microwave digestion was established as a soil pretreatment method. The analytical methods for simultaneous determination of six heavy metals in Co, V, Sb, Mn, Mo and Tl by inductively coupled plasma mass spectrometry (ICP-MS) were discussed. The results show that the correlation curves of standard curves for soil and sediment Cr, Ni, Cu, Zn, Cd and Pb were determined by ICP-MS method to be 1.0000, 0.9999, 0.9999, 0.9999, 0.9999, and 0.9999, respectively. The detection limits were 0.1 mg/kg, 0.1mg/kg, 0.1mg/kg, 0.1mg/kg, 0.1mg/kg, and 0.1mg/kg, respectively. The relative standard deviations of precision are 1.2%∼3.7%, 1.4%∼2.9%, 3.7%∼6.6%, 1.1%∼1.3%, 6.1%∼7.6% and 2.7%∼7.1%. The accuracy of the standard substance measured values are within the uncertainty range. The laboratory has verified the method of determining heavy metals in soil waste by ICP-MS. The linear relationship, detection limit, precision and accuracy are in line with the standard HJ 766-2015 requirements.