| 阻抑催化动力学光度法测定蔬菜中痕量草酸盐 |
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| 引用本文： | 吕艳阳,孙俊勇,商顺盈.阻抑催化动力学光度法测定蔬菜中痕量草酸盐[J].信阳师范学院学报(自然科学版),2007,20(1):93-95. |
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| 作者姓名： | 吕艳阳 孙俊勇 商顺盈 |
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| 作者单位： | 信阳师范学院,化学化工学院,河南,信阳,464000 |
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| 摘 要： | 在稀盐酸介质中,微量草酸根能有效地阻抑Mn2 对NaIO4氧化甲基紫褪色反应的催化作用,非离子表面活性剂TritonX-100对此体系有强烈的增敏作用,据此建立了表面活性剂增敏阻抑催化动力学光度法测定蔬菜中微量草酸盐的新方法.该方法测定波长为590 nm,方法的线性范围为0.10~0.84 mg/L,检出限为0.002 mg/L.该方法用于测定菠菜中草酸盐含量,结果令人满意.
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| 关 键 词： | 甲基紫 动力学光度分析 阻抑作用 草酸盐 |
| 文章编号： | 1003-0972（2007）01-0093-03 |
| 收稿时间： | 2006-04-06 |
| 修稿时间： | 2006-04-062006-10-10 |
Kinetic Spectrophotometry Determination of Trace Oxalate Based on Its Inhibitory Effect in Mn(Ⅱ)-Hydrogen Peroxide Methyl-Purple System |
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| LV Yan-yang,SUN Jun-yong,SHANG Shun-ying.Kinetic Spectrophotometry Determination of Trace Oxalate Based on Its Inhibitory Effect in Mn(Ⅱ)-Hydrogen Peroxide Methyl-Purple System[J].Journal of Xinyang Teachers College(Natural Science Edition),2007,20(1):93-95. |
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| Authors: | LV Yan-yang SUN Jun-yong SHANG Shun-ying |
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| Institution: | College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang 464000, China |
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| Abstract: | A simple and sensitive kinetic spectrohotometric method for determination of oxalate in vegetable is reported.The method is based on the inhibitory effect of oxalate on the catalytic oxidation reaction of methyl-purple with NaIO4 by Mn2 in HCl and nonionic surfactant Triton X-100.The deterction limit for oxalate is 0.002 mg/L and the linear range of the determination is 0.10~0.84 mg/L.This method has been used to determine trace oxalate in spinach.The results obtained are satisfactory. |
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| Keywords: | methyl-purple kinetic spctrophotometry inhibition oxalate |
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