| 方波伏安法测定酚酞片含量 |
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| 引用本文： | 冒爱荣,严金龙.方波伏安法测定酚酞片含量[J].分析测试技术与仪器,2005,11(3):182-183. |
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| 作者姓名： | 冒爱荣 严金龙 |
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| 作者单位： | 盐城工学院,实验教学部,江苏,盐城,224003 |
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| 摘 要： | 研究了酚酞在0.5 mol/L氨水-氯化铵缓冲溶液(pH 10)介质中汞膜电极上的电化学行为,并依此建立了酚酞含量的方波伏安法测定.酚酞于-0.98 V(VS.Ag/AgCl)处出现一灵敏的阴极还原峰,峰高与酚酞的浓度在3.0×10-7-5.0×10-5mol/L范围内有良好的线性关系.方法的最低检出限为1.0×10-7mol/L,方法用于酚酞片中酚酞含量的测定,结果满意.
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| 关 键 词： | 酚酞 方波伏安法 |
| 文章编号： | 1006-3757（2005）03-0182-02 |
| 收稿时间： | 2005-05-13 |
| 修稿时间： | 2005-07-27 |
Determination of Phenophthalein by Square Wave Voltammetry |
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| MAO Ai-rong and YAN Jin-long.Determination of Phenophthalein by Square Wave Voltammetry[J].Analysis and Testing Technology and Instruments,2005,11(3):182-183. |
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| Authors: | MAO Ai-rong and YAN Jin-long |
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| Institution: | Department of Experiment Teaching, Yancheng Institute of Technology, Yancheng 224003, China;Department of Experiment Teaching, Yancheng Institute of Technology, Yancheng 224003, China |
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| Abstract: | The electro-chemical behavior of phenophthalein has been studied in mercury film electrode,and an electro-chemical method for the determination of phenophthalein was established.In a buffer solution of NH3NH4Cl(pH 10),a reduction peak at -0.98 V(VS.Ag/AgCl) was observed.There was a good linear relationship between the peak height and the concentration of phenophthalein within the rang of 3.0×10-7~5.0×10-5 mol/L.The method was rapid,simple and accurate,and can be used for the determination of phenophthalein. |
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| Keywords: | square wave voltammetry phenophthalein |
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