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微波消解-双道原子荧光分析仪联合测定土壤中砷和汞
引用本文:付斌. 微波消解-双道原子荧光分析仪联合测定土壤中砷和汞[J]. 黑龙江环境通报, 2014, 0(4): 33-35
作者姓名:付斌
作者单位:齐齐哈尔市环境监测中心站,黑龙江齐齐哈尔161005
摘    要:应用AFS-9530型双道原子荧光光谱法研究土壤样品中砷和汞的联合测定技术,将土壤样品置于(1+1)王水的微波消解体系中进行消解,加入1m L 5%的重铬酸钾溶液保护汞,加入5m L(5%硫脲+5%抗坏血酸)混合液将五价砷还原为三价,以硼氢化钾为还原剂在5%盐酸介质中测定砷和汞,最低检出限为砷0.55μg/L,汞0.30μg/L,回收率砷在93.5%—105.8%之间,汞在85.5%—104.9%之间,满足准确度要求。

关 键 词:微波消解  双道原子荧光分析仪  土壤    

Determining Arsenic and Mercury in Soil with Microwave digestion Coupled with Double Channel Atomic Fluorescence Analyzer
FuBin. Determining Arsenic and Mercury in Soil with Microwave digestion Coupled with Double Channel Atomic Fluorescence Analyzer[J]. Heilongjiang Environmental Journal, 2014, 0(4): 33-35
Authors:FuBin
Affiliation:FuBin (Environment Monitoring Center Station of Qiqihaer City Qiqihar HeiLongjiang 161005)
Abstract:We used AFS-9530 double channel atomic fluorescence spectrometry to determine arsenic and mercury in soil samples. Soil samples were placed in microwave digestion system of (1+1) aqua regia, 1mL 5% potassium dichromate solution was added to protect mercury, 5mL 5% thiourea and 5% ascorbic acid mixture were added to deacidize pentavalent arsenicreduction to trivalent. Arsenic and mercury were determined in 5% hydrochloric acid medium with potassium borohydride as deoxidizer. The minimum detection limit of arsenic and mercury were 0.55g/L and 0.30 g/L. The recovery rate of arsenic was 93.5%-105.8%, the recovery rate of mercury was 85.5%-104.9%, met the accuracy requirement.
Keywords:Microwave digestion Double channel atomic fluorescence analyzer Soil Arsenic Mercury
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