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As people pay more and more attention to environmental pollution, heavy metal pollution of river sediments and surrounding soil is also brought into focus. The traditional methods used to analyze various metal elements as ICP, AFS etc. In this paper, Cu, Zn, Cd, Pb, Hg, Mn, Cr, Ni and As in river sediments and soil were simultaneously determined by ICP-MS with the quadrupole collision cell technology. The analysis efficiency is improved. The collision cell kinetic energy discrimination (KED) model is used to effectively eliminate the mass spectrum interference problem. The matrix effect and signal drift are corrected effectively by using Rh as the internal standard element. The method is verified under the stable instrument conditions. The verification results show that the mass concentration of all elements had a good linear relationship with spectral intensity, and the linear correlation coefficients were all greater than 0.999. The detection limits of 9 elements ranged from 0.01 to 0.3 µg·g-1. RSD was less than 6.25%, and RE was -7.10% to 7.08%, which proved that the method had good accuracy and precision. It can meet the requirements of determination.
Wang et al. (Wed,) studied this question.