| 光度法测定指甲和人发中微量锌 |
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| 引用本文： | 周磊,杜登学,刘耘.光度法测定指甲和人发中微量锌[J].理化检验(化学分册),2001,37(2):62-63,65. |
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| 作者姓名： | 周磊 杜登学 刘耘 |
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| 作者单位： | 山东轻工业学院化工系, |
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| 摘 要： | 研究了在溴化十六烷基三甲基铵和曲通 X- 1 0 0存在下 ,锌与 2 - (3,5-二溴 - 2 -吡啶偶氮 ) - 5-二乙氨基苯酚的显色反应。结果表明 ,在 p H7.0～ 9.5范围内 ,锌与 2 - (3,5-二溴 - 2 -吡啶偶氮 ) - 5-二乙氨基苯酚形成 1∶ 2稳定配合物 ,其最大吸收峰位于 572 nm处 ,摩尔吸光系数为 1 .3×1 0 5L·mol-1·cm-1。锌含量在 0～ 1 2 .0 μg/2 5ml范围内符合比耳定律。方法用于测定指甲和人发中微量锌 ,结果满意。
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| 关 键 词： | 光度法 锌 表面活性剂 指甲 人发 微量元素 分析 |
| 文章编号： | 1001-4020(2001)02-0062-02 |
PHOTOMETRIC DETERMINATION OF MICROAMOUNTS OF ZINC IN HUMAN HAIR AND NAILS |
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| ZHOU Lei,DU Deng-xue,LIU Yun.PHOTOMETRIC DETERMINATION OF MICROAMOUNTS OF ZINC IN HUMAN HAIR AND NAILS[J].Physical Testing and Chemical Analysis Part B:Chemical Analgsis,2001,37(2):62-63,65. |
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| Authors: | ZHOU Lei DU Deng-xue LIU Yun |
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| Abstract: | The colour reaction of zinc(I) with 3,5-diBr-PADAP in the presence of CTMAB and Triton X-100 is studied. The complex with its molar ratio of 1 to 2 is formed in a pH 7.0～9. 5 buffer solution. The ab
sorption maxima lies at 572nm with its apparent molar absorptivity of 1.3×105L·mol-1·cm-1. Beer's law is obeyed in the range of 0～12. 0μg/25ml for zinc(I). The method has been applied to determine microamounts of zinc in human hair and nails with satisfctory results. |
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| Keywords: | Photometry Zinc 3 5 diBr PADAP CTMAB Triton X 100 |
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