| Determination of total arsenic by photo-decomposition of organoarsenic compounds and hydride generation electrothermal atomic absorption spectrometry |
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| 作者姓名： | Han Hengbin Liu Yanbing Zhang Shuzhen Ni Zheming |
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| 作者单位： | Han Hengbin，Liu Yanbing，Zhang Shuzhen Ni ZhemingResearch Center for Eco-Environmental Sciences，Chinese Academy of Sciences，P. O. Box 2871，Beijing 100085，China |
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| 摘 要： | A method was developed for the determination of total arsenic concentration in less than ng/ml level by decomposition of organoarsenicals using photo -oxidation combined with in situ trapping of arsenic hydride on a palladium coated graphite tube with subsequent atomization and detection by AAS. The organoarsenicals include monomethylarsenic, dimethylarsenic, arsenobetaine, arsenocholine, o -aminobenzenarsenate and p -aminobenzenarsenate. The method is simple and sensitive. Detection limit was obtained from different arsenic compounds over the range from 0. 058 to 0.063 ng/ml as As (based on three times of the standard deviation of 10 blank measurements) and the relative standard deviations for ten replicate measurements were from 2.0 to 3.8%. The calibration curves of arsenic compounds including inorganic and organic arsenicals were linear over the range from 0.1 to 3.0 ng/ml as As. The recommended method has been applied to the determination of total arsenic in tap and lake water samples at ng/ml leve
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| 关 键 词： | electrothermal atomic absorption spectrometry photo -decomposition organoarsenic compounds arsenic hydride generation tap/lake water |
| 收稿时间： | 1992/6/20 0:00:00 |
Determination of total arsenic by photo-decomposition of organoarsenic compounds and hydride generation electrothermal atomic absorption spectrometry |
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| Han Hengbin,Liu Yanbing,Zhang Shuzhen,Ni Zheming.Determination of total arsenic by photo-decomposition of organoarsenic compounds and hydride generation electrothermal atomic absorption spectrometry[J].Journal of Environmental Sciences,1993,5(1):99-107. |
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| Authors: | Han Hengbin Liu Yanbing Zhang Shuzhen Ni ZhemingResearch Center for Eco-Environmental Sciences Chinese Academy of Sciences P O Box Beijing China |
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| Institution: | Han Hengbin,Liu Yanbing,Zhang Shuzhen Ni ZhemingResearch Center for Eco-Environmental Sciences,Chinese Academy of Sciences,P. O. Box 2871,Beijing 100085,China |
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| Abstract: | A method was developed for the determination of total arsenic concentration in less than ng/ml level by decomposition of organoarsenicals using photo -oxidation combined with in situ trapping of arsenic hydride on a palladium coated graphite tube with subsequent atomization and detection by AAS. The organoarsenicals include monomethylarsenic, dimethylarsenic, arsenobetaine, arsenocholine, o -aminobenzenarsenate and p -aminobenzenarsenate. The method is simple and sensitive. Detection limit was obtained from different arsenic compounds over the range from 0. 058 to 0.063 ng/ml as As (based on three times of the standard deviation of 10 blank measurements) and the relative standard deviations for ten replicate measurements were from 2.0 to 3.8%. The calibration curves of arsenic compounds including inorganic and organic arsenicals were linear over the range from 0.1 to 3.0 ng/ml as As. The recommended method has been applied to the determination of total arsenic in tap and lake water samples at ng/ml levels. |
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| Keywords: | electrothermal atomic absorption spectrometry photo -decomposition organoarsenic compounds arsenic hydride generation tap/lake water |
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