| 分散液液微萃取-石墨炉原子吸收光谱法测定环境水样中的痕量镉 |
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| 引用本文： | 马晓国,罗颂华,曾倩.分散液液微萃取-石墨炉原子吸收光谱法测定环境水样中的痕量镉[J].生态环境,2011,20(12):1909-1911. |
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| 作者姓名： | 马晓国 罗颂华 曾倩 |
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| 作者单位： | 广东工业大学环境科学与工程学院,广东广州5 10006 |
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| 基金项目： | 国家自然科学基金项目(20875018) |
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| 摘 要： | 建立了分散液液微萃取分离富集一石墨炉原子吸收光谱法测定环境水样中痕量镉的新方法。以二乙基二硫代氨基甲酸钠为螯合剂、四氯化碳为萃取剂、丙酮为分散剂，详细考察YpH值、螯合剂质量分数、萃取剂体积、萃取时间等因素的影响。在优化的实验条件下，方法对水样中镉的检出限为4．2ng-L^-1，线性范围是20-300ng-L^-1，测定结果的相对标准偏差为3．5％，富集倍数达103。将建立的方法应用于三种实际环境水样中镉的检测，加标回收率在92％-108％范围内。本方法具有灵敏、准确、快速、环保的特点，是一种分析水样中痕量镉的较好方法。
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| 关 键 词： | 镉 水样 分散液液微萃取 石墨炉原子吸收光谱法 |
Determination of trace amount of cadmium in environmental water samples using dispersive liquid-liquid microextraction coupled with graphite furnace atomic absorption spectrometry |
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| MA Xiaoguo
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LUO Songhua
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ZENG Qian.Determination of trace amount of cadmium in environmental water samples using dispersive liquid-liquid microextraction coupled with graphite furnace atomic absorption spectrometry[J].Ecology and Environmnet,2011,20(12):1909-1911. |
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| Authors: | MA Xiaoguo LUO Songhua ZENG Qian |
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| Institution: | MA Xiaoguo,LUO Songhua,ZENG Qian Faculty of Environmental Science and Engineering,Guangdong University of Technology,Guangzhou 510006,China |
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| Abstract: | A novel method for determination of trace amount of cadmium in environmental water samples by graphite furnace atomic absorption spectrometry coupled with dispersive liquid-liquid micro-extraction was developed.Sodium diethyldithiocarbamatre(DDTC),carbon tetrachloride and acetone were used as the chelating agent,extraction solvent and dispersive solvent,respectively.The effects of sample pH,DDTC concentration,extractant volume and extraction time on cadmium extraction were investigated in detail.It was foun... |
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| Keywords: | Cadmium water samples dispersive liquid-liquid micro-extraction graphite furnace atomic absorption spectrometry |
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