| 催化动力学光度法测定痕量钴(Ⅱ) |
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| 引用本文： | 齐艳娟,王晓菊,李红玫,高红伟.催化动力学光度法测定痕量钴(Ⅱ)[J].光谱学与光谱分析,2002,22(3):449-450. |
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| 作者姓名： | 齐艳娟 王晓菊 李红玫 高红伟 |
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| 作者单位： | 长春师范学院化学系,吉林,长春,130032 |
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| 摘 要： | 本法基于钴 (Ⅱ )对高碘酸钾氧化孔雀绿的催化作用 ,提出一种灵敏地测定痕量钴 (Ⅱ )的新方法。该方法线性范围在 0～ 0 8μg·2 5mL- 1 ,检测限为 2 1× 10 - 1 0 g·mL- 1 。测定出反应表现活化能Ea=37 94kJ·mol- 1 。此法用于茶叶、维生素B1 2 中钴的测定 ,结果满意
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| 关 键 词： | 钴 高碘酸钾 孔雀绿 痕量分析 催化动力学光度法 测定 |
| 文章编号： | 1000-0593(2002)03-0449-02 |
| 修稿时间： | 2001年10月23 |
Catalytic Spectrophotometry for the Determination of Trace Cobalt by the New Indicating Reaction |
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| QI Yan juan,WANG Xiao ju,LI Hong mei,and GAO Hong wei.Catalytic Spectrophotometry for the Determination of Trace Cobalt by the New Indicating Reaction[J].Spectroscopy and Spectral Analysis,2002,22(3):449-450. |
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| Authors: | QI Yan juan WANG Xiao ju LI Hong mei and GAO Hong wei |
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| Institution: | Department of Chemistry, Changchun Normal College, Changchun 130032, China. |
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| Abstract: | A kinetic spectrophotometric method for the determination of trace cobalt(II) was established. It was based on the Co(II) catalyzing the discoloring reaction of malachite green by potassium periodate in the presence of HBO3-Na2B4O7 solution (pH = 8.5). The sensitivity of the method is 2.1 x 10(-10) g.mL-1. The range of determination is 0-0.8 microgram.25 mL-1. The apparent activation of catalytic reaction is 37.94 kJ.mol-1. The method has been applied to the determination of cobalt in tea leaf and injection of vitamin B12 samples with satisfactory results. |
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| Keywords: | Cobalt Potassium periodate Malachite green Catalytic spectrophotometry |
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