| 分光光度法测定海产品中微量镉 |
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| 引用本文： | 蒋桂华,王晓菊,唐燕红,刘珍. 分光光度法测定海产品中微量镉[J]. 光谱学与光谱分析, 1999, 19(3): 474-475 |
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| 作者姓名： | 蒋桂华 王晓菊 唐燕红 刘珍 |
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| 作者单位： | 长春师范学院化学系,130032,长春 |
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| 摘 要： | 本文在文献［１］基础上，研究了在六次甲基四胺－ＫＮＯ３－ＨＮＯ３存在下，镉与二甲酚橙显色反应的最佳条件。在ｐＨ＝６．２～６．４范围内，镉与二甲酚橙配合物的最大吸收波长λｍａｘ＝５７８．４ｎｍ，摩尔吸光系数为１．６×１０４Ｌｍｏｌ－１ｃｍ－１，镉含量在０．５～６μｇｍＬ－１范围内符合朗伯比耳定律，检测限为０．００７μｇｍＬ－１，回收率在９０％以上，方法简便，灵敏度高，用于样品分析取得满意结果。
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| 关 键 词： | 分光光度法 显色反应 镉 二甲酚橙 |
Spectrophotometric Determination of Trace Amount of Cadmium in Marine Products |
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| Guihua JIANG,Xiaoju WANG,Yanhong TANG,Zhen LIU. Spectrophotometric Determination of Trace Amount of Cadmium in Marine Products[J]. Spectroscopy and Spectral Analysis, 1999, 19(3): 474-475 |
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| Authors: | Guihua JIANG Xiaoju WANG Yanhong TANG Zhen LIU |
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| Affiliation: | Department of Chemistry, Changchun Normal College, 130032 Changchun. |
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| Abstract: | The colour reaction of Cd(II) on xylend orange in the presence of hexamethylenetetramine-KNO3-HNO3 has been studied. Cd(II) forms the complex at pH = 6.2-6.4 (lambda(max) = 578.4 nm) with an apparent molar absorptivity of 1.6 x 10(4) L x mol(-1) x cm(-1). Beer's law is obeyed for Cd(II) in the range of 0.5-6 microg x mL(-1). The detection limit is 0.007 microg x mL(-1) with the recovery of 90%-105%. The method is simple and highly sensitive, and has been applied to the analysis of sample with satisfactory results. |
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| Keywords: | Spectrophotometric method Colour reaction Cadmium |
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