Determination of Sixteen Heavy Metals in Aluminium Lakes by Octopole Reaction System Inductively Coupled Plasma Mass Spectrometry

doi:10.7506/spkx1002-6630-201224040

Abstract

Abstract: An analytical method for the simultaneous determination of 16 heavy metals (V, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Ag, Cd, Sn, Sb, Ba, Hg and Pb) in aluminium lakes was established using octopole reaction system inductively coupled plasma mass spectrometry (ORS-ICP-MS). Samples were digested by both HCl and HNO3 followed by dilution with ultrapure water before ORS-ICP-MS analysis. The interference of polyatomic ions was effectively eliminated by introducing hydrogen or helium into the ORS cell. The optimum experimental conditions were established. The method was shown to be very sensitive with limits of quantification in the range of 0.016–1.124 μg/L for all the investigated metals, their average spike recoveries ranged from 90.6% to 106.6% with relative standard deviations (RSDs) less than 3.79%.

Key words: octopole reaction system (ORS), inductively coupled plasma mass spectrometry (ICP-MS), food additives, aluminium lakes, heavy metals

CLC Number:

O657.63

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