金属-陶瓷电热蒸发-原子荧光法快速测定土壤中汞

引用本文: 吕照慧, 毛雪飞. 金属-陶瓷电热蒸发-原子荧光法快速测定土壤中汞[J]. 分析化学, 2022, 50(9): 1399-1406. doi: 10.19756/j.issn.0253-3820.221197 shu

Citation: LYU Zhao-Hui, MAO Xue-Fei. Rapid Determination of Mercury in Soil by Metal Ceramics Electrothermal Vaporization-Atomic Fluorescence Spectrometry[J]. Chinese Journal of Analytical Chemistry, 2022, 50(9): 1399-1406. doi: 10.19756/j.issn.0253-3820.221197 shu

金属-陶瓷电热蒸发-原子荧光法快速测定土壤中汞

吕照慧 ^1,2, ,
毛雪飞 ^{1,2,
,}

1.
中国农业科学院农业质量标准与检测技术研究所, 北京 100081;
2.
农业农村部农产品质量安全重点实验室, 北京 100081

通讯作者: 毛雪飞,E-mail:mxf08@163.com

基金项目:
国家重点研发计划项目（No.2021YFD2000202）和西藏自治区科技计划项目（No.XZ202001ZY0048N）资助。

摘要: 研制了一种由金属-陶瓷杯和催化热解炉组成的金属-陶瓷电热蒸发(MCH-ETV)装置,将其与原子荧光光谱仪(AFS)联用,集成为一套MCH-ETV-AFS仪器系统,通过优化蒸发功率、原子化器条件、工作气体流速等参数,建立了一种直接进样快速检测土壤中汞(Hg)的方法。在最优条件下,Hg的检出限(LOD)为0.16 ng/g (进样量50 mg),在8~590 ng/g线性范围内,线性相关系数(R²)为0.996。3种土壤基体标准物质的Hg测定值在其标定的不确定度范围内,9种实际土壤样品的Hg测定值与标准方法的测定结果无显著性差异(p>0.05),回收率为96%~107%;真实土壤样品多次测定的相对标准偏差(RSD)在2%~11%之间。研究结果表明,本方法具有良好的准确度和精密度。由于无需金汞齐的富集过程,本方法在3 min内即可完成检测,采用的MCH-ETV尺寸小、功耗低(<200 W),这为进一步研发小型化测汞仪提供了新思路。

关键词:

English

Rapid Determination of Mercury in Soil by Metal Ceramics Electrothermal Vaporization-Atomic Fluorescence Spectrometry

LYU Zhao-Hui ^1,2, ,
MAO Xue-Fei ^{1,2,
,}

1.
Institute of Quality Standard and Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, Beijing 100081, China;
2.
Key Laboratory of Agro-food Safety and Quality, Ministry of Agriculture and Rural Affairs, Beijing 100081, China

Corresponding author: MAO Xue-Fei, mxf08@163.com

Received Date: 22 April 2022
Revised Date: 10 May 2022
Fund Project:
Supported by the National Key Research and Development Program of China (No.2021YFD2000202) and the Science and Technology Project of Tibet Autonomous Region, China (No.XZ202001ZY0048N).

Abstract: A metal-ceramic heater (MCH) was used for the first time as a solid direct sampling electrothermal vaporizer (ETV), and a new mercury analyzer was thus fabricated by combining MCH-ETV with an atomic fluorescence spectrometer (AFS). The instrumental conditions, such as vaporization power, atomizer flame, working gas flow rate, etc., were optimized, and a direct solid sampling analysis method for Hg in soil was thereby established without sample digestion. Under the optimal conditions, the detection limit (LOD) of Hg was 0.16 ng/g with sample size of 50 mg, and the regression coefficient (R²) was 0.996 in the linear range of 8-590 ng/g. The Hg values of three soil certified reference materials (CRMs) measured by this method were within their ranges of the certified values; further, the Hg values of the nine real soil samples were consistent with the results by the standard method, and the recoveries were 96%-107%, proving favorable analytical accuracy. Moreover, the relative standard deviations (RSDs) of repeated measurements for real soil samples ranged from 2% to 11%, indicating acceptable analytical precision. Due to canceling gold amalgamation, the whole analysis time of this method was less than 3 min. As well, the MCH-ETV power consumption was below 200 W with a small size, which was thereby suitable for the miniaturization of commercialized mercury analyzer in the future.

Key words:

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

金属-陶瓷电热蒸发-原子荧光法快速测定土壤中汞

通讯作者: 毛雪飞,E-mail:mxf08@163.com

English

Rapid Determination of Mercury in Soil by Metal Ceramics Electrothermal Vaporization-Atomic Fluorescence Spectrometry

Corresponding author: MAO Xue-Fei, mxf08@163.com

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

金属-陶瓷电热蒸发-原子荧光法快速测定土壤中汞

通讯作者: 毛雪飞,E-mail:mxf08@163.com

English

Rapid Determination of Mercury in Soil by Metal Ceramics Electrothermal Vaporization-Atomic Fluorescence Spectrometry

Corresponding author: MAO Xue-Fei, mxf08@163.com

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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