吡哆醇的催化极谱波研究

Polarographic Catalytic Wave of Pyridoxine

发现了吡哆醇在有Ｎｉ２＋共存时的极谱催化波。详细研究了其极谱波的性质。在ｐＨ为６．００的磷酸氢二钠－柠檬酸缓冲液中，于０．５次微分伏安曲线上，在－１．４５伏（ｖｓ．ＳＣＥ）附近观察到一灵敏极谱峰。采用０．５次微分伏安技术，可测定１０（－８）～１０（－６）ｍｏｌ／Ｌ范围的吡哆醇，实测了市售倒模粉中吡哆醇的含量，样品平均回收率达８５％，１０次测定的变异系数为４．６％，表明该法可用于化妆品中微量吡哆醇的测定。

The catalytic polarography of pyridoxine with Ni(2+) was investigated.The electrochemical behaviour was studied in detail.In the base solution of(0.2 mol/L Na2HPO4 + 0.1mol/L citric acid, pH=6.00 ), the peak potential was found at-1. 45 volt (vs.SCE)on the e-E curve. Pyriddoxine can be determined in the range of 10(-8)～10(-5) mol/L by semi-differential polarography. The average recovery of the determination results for the commercial model maske was 8 5%and the RSD was4.6%.