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Determination of Heavy Metal Elements in Soil by Inductively Coupled Plasma Mass Spectrometry

LI Ye-ju

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Abstract

In order to solve the problem that soil heavy metal pollution is increasingly serious, inductively coupled plasma mass spectrometry(ICP-MS) method was established to determine Cd, Pb, Ni, Cu,zinc, Cr and other heavy metal element content in soil. HNO3-H2O2 was used to digest soil samples; the sample digestion pretreatment conditions were selected and optimized as well as parameters of the apparatus. In the mass spectrum measurement, In, Bi, Ge elements were used as internal standard element for the correction of matrix effect and the signal drift. The results show that the method detection limit is 0.020 ~ 0.180 μg/L, the recovery rate is 90.8% ~ 102.0%, relative standard deviation is 2.2% ~ 3.5%, RSD of the method is 0.94% ~ 4.63%; Measured values of Cd, Pb, Ni, Cu, zinc, Cr are in agreement with reference values of GBW07427 national standards.

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What this paper is about

In order to solve the problem that soil heavy metal pollution is increasingly serious, inductively coupled plasma mass spectrometry(ICP-MS) method was established to determine Cd, Pb, Ni, Cu,zinc, Cr and other heavy metal element content in soil. HNO3-H2O2 was used to digest soil samples; the sample digestion pretreatment conditions were selected and optimized as well as parameters of the apparatus. In the mass spectrum measurement, In, Bi, Ge elements were used as internal standard element for the correction of matrix effect and the signal drift. The results show that the method detection limit is 0.020 ~ 0.180 μg/L, the recovery rate is 90.8% ~ 102.0%, relative standard deviation is 2.2% ~ 3.5%, RSD of the method is 0.94% ~ 4.63%; Measured values of Cd, Pb, Ni, Cu, zinc, Cr are in agreement with reference values of GBW07427 national standards.

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Available abstract

In order to solve the problem that soil heavy metal pollution is increasingly serious, inductively coupled plasma mass spectrometry(ICP-MS) method was established to determine Cd, Pb, Ni, Cu,zinc, Cr and other heavy metal element content in soil. HNO3-H2O2 was used to digest soil samples; the sample digestion pretreatment conditions were selected and optimized as well as parameters of the apparatus. In the mass spectrum measurement, In, Bi, Ge elements were used as internal standard element for the correction of matrix effect and the signal drift. The results show that the method detection limit is 0.020 ~ 0.180 μg/L, the recovery rate is 90.8% ~ 102.0%, relative standard deviation is 2.2% ~ 3.5%, RSD of the method is 0.94% ~ 4.63%; Measured values of Cd, Pb, Ni, Cu, zinc, Cr are in agreement with reference values of GBW07427 national standards.

Key concepts: Inductively coupled plasma mass spectrometry, Zinc, Chemistry, Detection limit, Mass spectrometry, Analytical Chemistry (journal), Inductively coupled plasma, Metal

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