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Voltammetric detection of vitamin B-1 at carbon paste electrodes and its determination in tablets

机译：碳糊电极上伏安法测定维生素B-1及其在片剂中的测定

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The voltammetric behavior of vitamin B-1 in alkaline medium at carbon paste electrode (CPE) is discussed. A method based on cyclic voltammetry for the determination of vitamin B-1 at carbon paste electrode modified with manganese phthalocyanine (MnPc-CPE) is presented. In pH 10 buffer, the modified electrode showed catalytic activity towards the oxidation of vitamin B-1 by considerably increasing the oxidation current of one of the observed waves compared to the oxidation current obtained at an unmodified electrode. The modified electrode was stable towards the determination of vitamin B-1 compared to the unmodified electrode that is completely poisoned after a few scans. A linear relationship between the oxidation current and the concentration of vitamin B-1 in solution was observed. The detection limit for vitamin B-1 at the modified electrode was of the order of 10(-5) mol dm(-1). Commercial vitamin B-1 tablets were analyzed using the modified electrodes. [References: 39]
机译：讨论了维生素B-1在碱性介质中碳糊电极（CPE）的伏安行为。提出了一种基于循环伏安法测定锰酞菁（MnPc-CPE）修饰的碳糊电极上维生素B-1的方法。在pH 10缓冲液中，与未修饰电极上获得的氧化电流相比，修饰电极通过显着增加所观察到的一种波的氧化电流，表现出对维生素B-1氧化的催化活性。与经过几次扫描后完全中毒的未修饰电极相比，修饰电极对维生素B-1的测定是稳定的。观察到氧化电流与溶液中维生素B-1的浓度之间存在线性关系。修饰电极上维生素B-1的检出限为10（-5）mol dm（-1）。使用修饰的电极分析了商业维生素B-1片剂。 [参考：39]

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