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Author Spotlight: Technologies and Challenges in Elemental Analysis of Food Samples
Published on: December 22, 2023
Simultaneous multi-elemental speciation of As, Hg and Pb by inductively coupled plasma mass spectrometry interfaced
Danyu Zhang1, Shiwei Yang1, Qingfang Ma2
1College of Material Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, China.
Abstract:
This work establishes a hyphenated methodology coupling HPLC with ICP-MS for simultaneous speciation analysis of arsenic, mercury and lead for the first time. Four arsenicals (As(III), DMA, MMA and As(V)), four mercurials (Hg(II), MeHg, EtHg and PhHg) and three lead compounds (Pb(II), TML and TEL) were simultaneously analyzed within only 8 min with acceptable resolution (2.0-8.2 for As, 1.6-6.1 for Hg and 2.7-4.0 for Pb). The detection limits were 0.036-0.20 for As-species, 0.023-0.041 for Hg-species, and 0.0076-0.14 μg L-1 for Pb-species. The developed method was applied for the measurement of five lotus seed samples, indicating the presence of DMA (19.6-28.2 μg kg-1), TML (1.4-2.9 μg kg-1), MeHg (1.2-4.8 μg kg-1) and EtHg (0.8-2.2 μg kg-1). This method provides a promising tool for studying the toxic, metabolic and bioavailable behaviors of arsenic, mercury and lead.
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