| 聚茜素红薄膜修饰电极测定丹宁酸 |
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| 引用本文： | 尹起范,齐丹华,徐继明,李伟,韩文霞.聚茜素红薄膜修饰电极测定丹宁酸[J].淮阴师范学院学报(自然科学版),2008,7(2). |
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| 作者姓名： | 尹起范 齐丹华 徐继明 李伟 韩文霞 |
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| 摘 要： | 以聚茜素红薄膜修饰电极(PARE)为工作电极,0.05 mol/LHAc-NaAc(pH 5.0)为支持电解质,通过差分脉冲伏安法研究了丹宁酸在修饰电极上的伏安行为.结果表明,当丹宁酸浓度在5.0×10-6~5.0×10-3mol/L范围内,丹宁酸的浓度与氧化峰电流成线性关系,线性方程为i(μA)=0.2768c(10-6mol/L)+2.636,r=0.9966,检出限达1.0×10-7mol/L.方法简便,用于茶叶中丹宁酸的测定,7次测定的RSD%为2.1.
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| 关 键 词： | 聚茜素红 修饰电极 丹宁酸 差分脉冲伏安法 |
Determination of Tannin Acid by Poly(Alizarin Red) Film Modified Electrode |
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| YIN Qi-fan,QI Dan-hua,XU Ji-ming,LI Wei,HAN Wen-xia.Determination of Tannin Acid by Poly(Alizarin Red) Film Modified Electrode[J].Journal of Huaiyin Teachers College(Natrual Science Edition),2008,7(2). |
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| Authors: | YIN Qi-fan QI Dan-hua XU Ji-ming LI Wei HAN Wen-xia |
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| Abstract: | The electrochemical behavior of tannin acid on Poly(Alizarin Red) film modified electrode(PARE) were investigated by differentical pulse stripping voltammetry(dpv) in 0.05mol/L HAc-NaAc(pH 5.0) buffer solution.The linear range for determination of tannin is 5.0×10-6mol/L～5.0×10-3mol/L with detection limit of 1.0×10-7mol/L.The linear equation is i(μA)=0.2768c(10-6mol/L)+2.636,r=0.9966.The method can be applicable to determine the tannin in tea leaf,the RSD% is 2.1 with 7 times determination. |
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| Keywords: | poly(Alizarin Red) modified electrode tannin acid differentical pulse stripping voltammetry(dpv) |
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