电感耦合等离子体质谱法测定地下水中的六价铬
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摘要
为了快速、准确的完成地下水体中六价铬的检测,本试验采用H-732型阳离子交换树脂对地下水体进行前期处理,使地下水体中的六价铬有效分离,再利用洗脱液对树脂中吸附的六价铬进行洗脱,从而完成了地下水体中六价铬的分离与富集,采用电感耦合等离子体质谱(ICP-MS)对富集后的溶液进行分析测试:方法的最低检出限为0.04μg/L;室内相对标准偏差为0.40%(n=6);相对误差为0.20%;加标回收率在94%-108%之间。试验结果表明,该方法能有效地对地下水体中的六价铬分离富集,试验的准确度、精密度、检出限均符合地下水质监测质量控制要求。
With the rapid development of science and technology,the traditional spectrophotometry technology for Cr(VI)testing has showed the shortcomings of trivial operation and more interference.Therefore,the advanced testing apparatus and methods are imperative.In this paper,inductively coupled plasma mass spectrometry(ICP-MS)was applied in determining the content of Cr(VI)in the groundwater.And the laboratory quality control indexes were as follows:The method minimum detection limit was 0.04μg/L and the indoor relative standard deviation was 0.40%(n=6).The relative error was 0.20%,and the recoveries were between 94% and 108% while the sample contents were in the range of 0.05-100μg/L.This method had excellent precision and accuracy.
With the rapid development of science and technology,the traditional spectrophotometry technology for Cr(VI)testing has showed the shortcomings of trivial operation and more interference.Therefore,the advanced testing apparatus and methods are imperative.In this paper,inductively coupled plasma mass spectrometry(ICP-MS)was applied in determining the content of Cr(VI)in the groundwater.And the laboratory quality control indexes were as follows:The method minimum detection limit was 0.04μg/L and the indoor relative standard deviation was 0.40%(n=6).The relative error was 0.20%,and the recoveries were between 94% and 108% while the sample contents were in the range of 0.05-100μg/L.This method had excellent precision and accuracy.
引文
[1]国家环境保护总局,《水和废水监测分析方法》编委会.水和废水监测分析方法[M].北京:中国环境科学出版社,2009.
[2]岩石矿物分析编委会.岩石矿物分析(第四分册)[M].北京:地质出版社,2011.
[3]岩石矿物分析编委会.岩石矿物分析(第一分册)[M].北京:地质出版社,2011.
[4]李冰,杨红霞.电感耦合等离子体质谱原理和应用[M].北京:地质出版社,2005.
[5]陈光,林立,钱聪,等.离子色谱-电感耦合等离子体质谱联用测定饮用水中的三价铬和六价铬[J].农业机械,2012(6):127-130.
[6]莫曦明,彭寨玉,徐淑暖,等.电感耦合等离子体质谱法(ICP-MS)测定饮用水中六价铬[J].中国卫生检验杂志,2009,16(8):1784-1785.
[2]岩石矿物分析编委会.岩石矿物分析(第四分册)[M].北京:地质出版社,2011.
[3]岩石矿物分析编委会.岩石矿物分析(第一分册)[M].北京:地质出版社,2011.
[4]李冰,杨红霞.电感耦合等离子体质谱原理和应用[M].北京:地质出版社,2005.
[5]陈光,林立,钱聪,等.离子色谱-电感耦合等离子体质谱联用测定饮用水中的三价铬和六价铬[J].农业机械,2012(6):127-130.
[6]莫曦明,彭寨玉,徐淑暖,等.电感耦合等离子体质谱法(ICP-MS)测定饮用水中六价铬[J].中国卫生检验杂志,2009,16(8):1784-1785.