环境空气颗粒物中汞的直接测定初探
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摘要
主要探究了利用热分解-金汞齐-原子吸收法对环境空气颗粒物中的汞进行测定。以石英滤膜为载体,采集环境空气颗粒物,分别进行方法检出限、方法精密度及准确度的实验。结果表明,该法最低检出含量为0.03 ng,测定下限为0.12 ng,方法精密度4.2%~9.4%,准确度79%~82%。此法简单快捷,无需前处理,仪器汞残留低且易清除,不失为一种有效测定环境空气颗粒物中汞的手段。
The use of thermal decomposition-gold amalgam-atomic absorption spectrophotometry for the direct determination of mercury in ambient air particulates mainly was explored. The silica particles were used as the carrier to collect ambient air particulates. The method detection limit,method precision and accuracy were tested. Experiments showed that the minimum detectable content of this method was 0. 03 ng. The lower detection limit was 0. 12 ng,the method precision was 4. 2% ~ 9. 4% and accuracy was 79% ~ 82%. This method is simple and fast, without pretreatment,mercury residue is low,and it is easy to remove. This is an effective method for the determination of mercury in ambient air particulates.
The use of thermal decomposition-gold amalgam-atomic absorption spectrophotometry for the direct determination of mercury in ambient air particulates mainly was explored. The silica particles were used as the carrier to collect ambient air particulates. The method detection limit,method precision and accuracy were tested. Experiments showed that the minimum detectable content of this method was 0. 03 ng. The lower detection limit was 0. 12 ng,the method precision was 4. 2% ~ 9. 4% and accuracy was 79% ~ 82%. This method is simple and fast, without pretreatment,mercury residue is low,and it is easy to remove. This is an effective method for the determination of mercury in ambient air particulates.
引文
[1]梁柱,吴福全,陆家骝,等.环境空气中汞的直接测定方法研究与应用[J].环境监控与预警,2014(6):27-29.
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[3]杨丽,尹卫萍.火电厂废气中汞监测技术发展现状与趋势分析[J].北方环境,2011,23(10):109-111.
[4]胡一蓉.某地燃煤电厂汞排放与国内外汞脱除技术分析[J].环境科技,2011,24(3):69-72.
[5]修光利,张艳艳,蔡姬,等.大气颗粒物中汞的赋存形态及其依存条件[J].环境科学研究,2013,26(8):807-813.
[6]査河霞,于平胜.工作场所空气中汞及其化合物的直接汞测定法[J].中华劳动卫生职业病杂志,2007,25(11):684-685.
[7]晏海峰.淮南市大气颗粒物中汞的分布及其污染特征研究[D].合肥:安徽理工大学,2009.
[8]冯新斌,洪斌.两次金汞齐-冷原子吸收光谱法测定雨水中不同形态的汞[J].环境化学,1998,17(4):388-392.
[2]耿勇超,刘新慧.测汞仪测定固定污染源废气颗粒物中的总汞[J].环境科技,2012,25(6):51-53.
[3]杨丽,尹卫萍.火电厂废气中汞监测技术发展现状与趋势分析[J].北方环境,2011,23(10):109-111.
[4]胡一蓉.某地燃煤电厂汞排放与国内外汞脱除技术分析[J].环境科技,2011,24(3):69-72.
[5]修光利,张艳艳,蔡姬,等.大气颗粒物中汞的赋存形态及其依存条件[J].环境科学研究,2013,26(8):807-813.
[6]査河霞,于平胜.工作场所空气中汞及其化合物的直接汞测定法[J].中华劳动卫生职业病杂志,2007,25(11):684-685.
[7]晏海峰.淮南市大气颗粒物中汞的分布及其污染特征研究[D].合肥:安徽理工大学,2009.
[8]冯新斌,洪斌.两次金汞齐-冷原子吸收光谱法测定雨水中不同形态的汞[J].环境化学,1998,17(4):388-392.