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当前位置: 首页 > 文章 > 微波消解-顺序注射氢化物发生-原子荧光光谱法测定堆肥中的Hg和As 农业环境科学学报 2006,25 (05) 1375-1378
Position: Home > Articles > Determination of Mercury and Arsenic in Compost by Microwave Digestion-Sequential Injection Hydride Generation-Atomic Fluorescence Spectrometry Journal of Agro-Environment Science 2006,25 (05) 1375-1378

微波消解-顺序注射氢化物发生-原子荧光光谱法测定堆肥中的Hg和As

作  者：
王玉军;窦森;张大军;崔俊涛
单  位：
吉林省土地勘测规划研究院;吉林农业大学资源与环境学院
关键词：
堆肥;微波消解;氢化物发生;原子荧光光谱法;Hg;As
摘  要：
采用微波消解技术处理堆肥样品,优化了样品前处理条件和仪器分析条件,建立了微波消解-氢化物发生-原子荧光光谱法测定堆肥中的Hg和As的分析方法。结果表明,该方法在最佳条件下,Hg、As的检出限分别为0.001 2、0.018μg.L-1,校准曲线的相关系数r均大于0.999。样品中待测元素的回收率在(100±8)%范围以内,RSD均小于2%,说明该方法具有简便、快速、灵敏、准确等特点,适合于堆肥样品的测定。通过堆肥产品和堆肥原料中的对比实验发现,堆肥后Hg、As的损失率小于7%,说明堆肥处理对重金属Hg、As的总量减少意义不大。
译  名：
Determination of Mercury and Arsenic in Compost by Microwave Digestion-Sequential Injection Hydride Generation-Atomic Fluorescence Spectrometry
作  者：
WANG Yu-jun1,DOU Sen1,ZHANG Da-jun2,CUI Jun-tao1(1.College of Resource and Environment Science,Jilin Agricultural University,Changchun 130118,China;2.Institute for Land Surveying and Planning of Jilin Province,Changchun 130061,China)
关键词：
compost;microwave digestion;hydride generation;atomic fluorescence spectrometry;mercury;arsenic
摘  要：
The method of microwave digestion-sequential injection hydride generation-atomic fluorescence spectrometry was proposed for determining mercury(Hg) and arsenic(As) in compost by means of optimizing pre-processing and instrumental performance.The digestion temperature and volume of reagent,flow chart of digestion of compost were determined.20 min pre-processing of a sample reduced the release volume of poisonous gas.The pre-processing method of sample had characteristic of low pollution,briefness and rapidity.Disturbing effect of HNO3 was eliminated with 1% ascorbic acid in the course of testing sample.Used Ar as carrier gas and sheath gas,the flow rate was respectively 400 and 800 mL·min-1,the carrier liquid was 0.12 mol·L-1 HCl,the reducer was KHB4(its content was respectively 0.01% and 1% for testing Hg and As).The detection limit of Hg and As was 0.001 2 μg·L-1 and 0.018 μg·L-1 respectively under optimal conditions.The correlation coefficient of standard curve was more than 0.999.The recovery of Hg and As was(100±8)%,with RSD below 2%.The testing method was sensitive and accurate.The loss ratio of Hg and As was below 7% after composting,indicating that the composting had little effect on Hg and As decreasing.

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