| 络天青S—CPB—Brij35胶束增溶吸光光度法测人发中微量铜 |
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| 引用本文： | 张莉. 络天青S—CPB—Brij35胶束增溶吸光光度法测人发中微量铜[J]. 理化检验(化学分册), 1999, 35(12): 533-534 |
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| 作者姓名： | 张莉 |
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| 作者单位： | 河南省地方病防治研究所 郑州450003 |
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| 摘 要： | 在阳离子表面活性剂ＣＰＢ和非离子表面活性剂Ｂｒｉｊ３５存在下，ｐＨ７．５的弱碱性介质中，二价铜离子与络天青Ｓ形成灵敏度高的１：２络合物。应用吸光度法测定人发中微量铜，铜含量在０．０２～２．０ｍｇ·Ｌ＾－１遵守比耳定律，方法检出限为限为０．０１ｍｇ·Ｌ＾－１，平均回收主继１００．５％±０．２１％，ＲＳＤ为０．２１％。此法用于人发中微量铜的测定。结果满意。
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| 关 键 词： | 胶束增溶 吸光光度法 铜 人发 |
MICELLAR SENSITIZED ABSORPTIOPHOTOMETRIC DETERMINATION OF TRACES OF COPPER IN HUMAN HAIR |
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| Zhang Li. MICELLAR SENSITIZED ABSORPTIOPHOTOMETRIC DETERMINATION OF TRACES OF COPPER IN HUMAN HAIR[J]. Physical Testing and Chemical Analysis Part B:Chemical Analgsis, 1999, 35(12): 533-534 |
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| Authors: | Zhang Li |
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| Affiliation: | Henan Institute for Prevention and Treatment of Endemic Diseases Zhengzhou 450003 |
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| Abstract: | It is found that in a borax buffer solution of pH 7. 5, Cu ( I ) reacts with CAS in the presence of mixed surfactants of CPB and Brij 35 to form a blue complex (molar ratio M ' R= 1 ' 2) with its absorption maxima at 620nm and its apparent molar absorptivity of 1. 3?10~(5)L ?mol~(-1) ?cm~(-1). Beer's law holds in the concentration range of 0. 02~2. Omg ?L~(-1) of copper( I ). A limit of detection of 0. Olmg ?L~(-1)(3S) and an average recovery of 100. 5%?. 21% are obtained for this method. This method has been applied to the determination of traces of copper in human hair. |
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| Keywords: | Micellar sensitized Absorptiophotometry CAS Copper( I ) Surfactants |
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