DMA-80直接测汞仪测定肥料样品中总汞含量  

Determination of Total Mercury in Fertilizer Samples by DMA-80 Direct Mercury Analyzer

作　　者：李亚丽 唐杉 魏淑敏[1] 张妙然 孙蓟锋 刘蜜[1] 汪洪 LI Yali;TANG Shan;WEI Shumin;ZHANG Miaoran;SUN Jifeng;LIU Mi;WANG Hong(Institute of Agricultural Resources and Regional Planning,Chinese Academy of Agricultural Sciences,China National Center for Quality Supervision and Test of Chemical Fertilizers(Beijing),Laboratory of Quality and Safety Risk Assessment for Agricultural Products from Fertilizer Sources,Ministry of Agriculture and Rural Affairs(Beijing),Beijing 100081,China;The Soil and Fertilizer Institute,Anhui Academy of Agricultural Sciences/Laboratory of Nutrient Cycling,Resources and Environment of Anhui,Hefei,Anhui 230031,China)

机构地区：[1]中国农业科学院农业资源与农业区划研究所,国家化肥质量监督检验中心(北京),农业农村部农产品质量安全肥料源性因子风险评估实验室(北京),北京100081 [2]安徽省农业科学院土壤肥料研究所,合肥230031

出　　处：《中国无机分析化学》2020年第3期18-22,共5页Chinese Journal of Inorganic Analytical Chemistry

基　　金：国家重点研发计划项目(2018YFD0201203);国家农产品质量安全风险评估项目(GJFP2019035,GJFP2019037);中央级公益性科研院所基本科研业务费专项(Y2019PT20-04和1610132019018)。

摘　　要：选择6个化学肥料样品和6个有机肥料样品,利用DMA-80直接测汞仪对肥料中的总汞进行了测定。对同一样品添加3种不同汞浓度汞标准溶液,每组3次重复,测定加标回收率在96.6%~104%;DMA-80直接测汞仪与原子荧光光谱法测定结果之间无显著差异;在实验过程中每个肥料样品利用测汞仪直接进样测定6组平行样,相对标准偏差小于5.0%;根据多次测定空白数据结果计算方法检出限为0.0137 ng。利用DMA-80测汞仪测定肥料中汞含量的方法具有操作简单、快速高效、检出限低等优点,可用于批量肥料样品中汞含量的快速测定分析。Six organic fertilizer samples and six chemical fertilizer samples were selected and the concentration of mercury in fertilizer was determined by DMA-80 direct mercury analyzer.The recovery rate was in ranges of 96.6%-104%when adding the standard Hg solution to the fertilizer samples.There was no any significant difference of the Hg contents measured by the DMA-80 and the atomic fluorescence spectrometer method.The relative standard deviation of determinations for 12 fertilizer samples with 6 repeats per sample was less than 5.0%.The detection limit of the method is 0.0137 ng.The proposed method saves time and is suitable for the fast and efficient measurement of batch fertilizer samples.

关 键 词：肥料 汞 测汞仪 

分 类 号：O657.3[理学—分析化学] TH744.1[理学—化学]