数字农科院2.0

Rapid and simultaneous detection of cadmium and mercury in foods based on solid sampling integrated electrothermal vaporization technique

文献类型： 外文期刊

作者： Hongyu Jia;Guanyu Lan;Xue Li;Lin Chen;Li Feng;Xuefei Mao

作者机构：

关键词： Cadmium;Foods;Integrated electrothermal vaporization;Mercury;Rapid and simultaneous detection;Solid sampling

期刊名称： Food Chemistry

ISSN： 0308-8146

年卷期： 2024 年 457 卷

页码：

收录情况： SCIE（2024版） ; ; EI（2024版）

摘要： This work presents an innovative solid sampling (SS) integrated electrothermal vaporization (ETV) approach for simultaneous determination of Cd and Hg based on differentiated elemental vaporization and transportation behavior characteristics. A miniature N2/H2 generator, only consuming electricity and H2O, was utilized to yield reducing atmosphere for Cd vaporization; MgO filler was modified to absorb matrix interferent and keep Hg and Cd transportation via 1st catalytic pyrolysis furnace (CPF); and a gearing was employed to move 2nd CPF to receive and trap (amalgamation) the vaporized Hg from ETV and then thermo-release them for simultaneous detection. Under optimized conditions, the limits of detection of Cd and Hg reached 0.02–0.04 ng/g using 0.4 g sample size. The linearities (R2) exceeded 0.998 and recoveries were 85.0–111.9%, indicating favorable analysis precision and accuracy within ∼3 min without sample digestion process. The proposed Hg[sbnd]Cd analyzer is suitable for rapid monitoring food with simplicity, green and safety.

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