| 铜与2—羟基—3—羧基—5—磺酸基苯重氮氨苯反应的分光光度法研究… |
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| 引用本文： | 郭忠先,蔡蜀穗.铜与2—羟基—3—羧基—5—磺酸基苯重氮氨苯反应的分光光度法研究…[J].光谱学与光谱分析,1997,17(6):108-112. |
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| 作者姓名： | 郭忠先 蔡蜀穗 |
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| 作者单位： | 南开大学化学系 |
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| 摘 要： |
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| 关 键 词： | 铜 分光光度法 HCSDAA 显色反应 |
Spectrophotometric studies on and applications of the reaction of copper with 2-hydroxy-3-carboxy-5-sulfobenzenediazoaminoazobenzene] |
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| Z Guo,S Cai.Spectrophotometric studies on and applications of the reaction of copper with 2-hydroxy-3-carboxy-5-sulfobenzenediazoaminoazobenzene][J].Spectroscopy and Spectral Analysis,1997,17(6):108-112. |
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| Authors: | Z Guo S Cai |
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| Institution: | Department of Chemistry, Nankai University, 300071 Tianjin. |
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| Abstract: | A highly sensitive color reaction of copper(II) with 2-hydroxy-3-carboxy-5-sulfobenzenediazoaminoazobenzene (HCSDAA) in the presence of Triton N-101 was studied in detail. In borax buffer medium at pH 10.4-11.5, the red complex formed has a maximum absorption at 530 nm and its apparent molar absorptivity is 1.31 x 10(5)L x mol(-1) x cm(-1) and sandell sensitivity is 4.85 x 10(-4) microg x cm(-2). The molar ratio of copper(II) to HCSDAA in the complex is found to be 1:2. Beer's law is obeyed in the concentraction range of 0-0.24 microg/mL for copper. The proposed method has been applied to the spectrophotometric determination of microamounts of copper in ore and peanut with the relative error and the relative standard deviation (n = 6) of less than 3.7% and 1.6%, respectively. |
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