| 浊点萃取-火焰原子吸收光谱法测定样品中的痕量钴 |
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| 引用本文： | 向国强,温圣平,江秀明,普旭力.浊点萃取-火焰原子吸收光谱法测定样品中的痕量钴[J].化学研究,2009,20(4):83-86. |
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| 作者姓名： | 向国强 温圣平 江秀明 普旭力 |
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| 作者单位： | 1. 河南工业大学,化学化工学院,河南,郑州,450052
2. 厦门检验检疫局,检验检疫技术中心,福建,厦门,361012 |
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| 基金项目： | 河南工业大学校博士基金 |
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| 摘 要： | 研究了基于表面活性剂Triton X-114和络合剂吡咯烷二硫代氨基甲酸铵（APDC）浊点萃取钴的样品前处理方法.优化了浊点萃取条件参数,包括pH值、Triton X-114用量、APDC浓度、平衡温度及时间等,建立了浊点萃取-火焰原子吸收光谱法测定痕量钴的方法.该法的检测限（3σ）为2.6μg/L,相对标准偏差RSD为6.2%（n=7,c=200μg/L）.该法成功地应用于海带、维生素B12注射液等样品中钴的测定.
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| 关 键 词： | 浊点萃取 原子吸收光谱法 食品样品 钴 测定 |
Determination of Trace Cobalt in Samples by Flame Atomic Absorption Spectrometry After Cloud Point Extraction |
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| XIANG Guo-qiang,WEN Sheng-ping,JIANG Xiu-ming,PU Xu-li.Determination of Trace Cobalt in Samples by Flame Atomic Absorption Spectrometry After Cloud Point Extraction[J].Chemical Research,2009,20(4):83-86. |
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| Authors: | XIANG Guo-qiang WEN Sheng-ping JIANG Xiu-ming PU Xu-li |
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| Institution: | XIANG Guo-qiang , WEN Sheng-ping, JIANG Xiu-ming , PU Xu-li ( I. School of Chemist attd Chem＆al Engineering, Henan University of Technology, Zhengzhou 450052, Henan, China 2. Xiamen Ento＇-exit Inspection and Quarantine Bureau, Xiamen 361012, Fujian, China) |
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| Abstract: | A new method for determination of trace cobalt in samples by flame atomic absorption spectrometry after cloud point extraction was developed.The cloud point extraction system was based on Triton X-114 as surfactant and ammonium pyrrolidyldithiocarbamate(APDC) as chelating agent.The parameters affecting cloud point extraction including pH,amount of Trion X-114,concentration of APDC,extraction temperature and time were optimized.The detection limit(3σ) was 2.6 μg/L,relative standard deviation was 6.2%(n=7,c=200μg/L) under the optimized conditions.The proposed method was successfully applied to the determination of trace cobalt in samples such as kelp and injection of vitamin B12. |
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| Keywords: | cloud point extraction flame atomic absorption spectrometry food samples cobalt determination |
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