| 7-碘-8-羟基喹啉-5-磺酸体系分光光度法测定水样中铜的含量 |
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| 引用本文： | 吴兰菊,方克鸣,王卫平.7-碘-8-羟基喹啉-5-磺酸体系分光光度法测定水样中铜的含量[J].光谱实验室,2010,27(2):607-609. |
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| 作者姓名： | 吴兰菊 方克鸣 王卫平 |
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| 作者单位： | 浙江师范大学化学与生命科学学院,浙江省金华市金虹街16号,321004 |
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| 摘 要： | 研究了7-碘-8-羟基喹啉-5-磺酸与铜(Ⅱ)的显色反应。在pH=5.0Clark-Lubs缓冲介质中,铜(II)与7-碘-8-羟基喹啉-5-磺酸形成黄色络合物,其最大吸收波长位于380nm处,表观摩尔吸光系数为7.35×103L.mol-1.cm-1,铜(II)的含量在0.15—4.5μg/mL范围内符合比耳定律,线性回归方程为A=0.1122x(μg/mL)+0.0079,相关系数0.9999。方法用于合成水样中微量铜的测定,回收率为99%—110%,结果满意。
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| 关 键 词： | Cu（Ⅱ） 7-碘-8-羟基喹啉-5-磺酸 分光光度法 |
Spectrophotometric Determination of Copper in Water Using 7-Iodo-8-Hydroxyquinoline-5-Sulfonic Acid System |
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| Wu Lan-Ju,Fang Ke-Ming,Wang Wei-Ping.Spectrophotometric Determination of Copper in Water Using 7-Iodo-8-Hydroxyquinoline-5-Sulfonic Acid System[J].Chinese Journal of Spectroscopy Laboratory,2010,27(2):607-609. |
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| Authors: | Wu Lan-Ju Fang Ke-Ming Wang Wei-Ping |
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| Institution: | College of Chemistry and Life Science;Zhejiang Normal University;Jinhua;Zhejiang 321004;P.R.China |
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| Abstract: | The color reaction of Cu (Ⅱ) with 7-iodo-8-hydroxyquinoline-5-sulfonic acid takes palce and forms a complex in pH = 5.0 Clark-Lubs buffer solution.The apparent molar absorptivity of this chelate is 7.35×10~3L·mol~(-1)·cm~(-1) at 380nm.Beer's law is obeyed in the range of 0.15-4.5μg/mL for Cu (Ⅱ).The linear equation is A = 0.0079 + 0.1122x (μg/mL), r = 0.9999.The method is applied to the determination of Cu(Ⅱ) in water with satisfactory results. |
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| Keywords: | 7-Iodo-8-Hydroxyquinoline-5-Sulfonic Acid Spectrophotometry |
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