EDTA存在下单扫描示波极谱中氧畸峰异常现象的研究及应用

EDTA存在下单扫描示波极谱中氧畸峰异常现象的研究及应用 STUDY AND APPLICATION OF ABNORMAL PHENOMENA OF OXYGEN MAXIMUM IN THE PRESENCE OF EDTA WITH THE SINGLE SWEEP OSCILLOGRAPHIC POLAROGRAPHY 韦进宝 first-author 李培标 周性尧 氧极大通常是属于第一类极大,电流大小表现出遵循欧姆定律。本文报导在低浓度的EDTA存在下,氧极大出现异常现象,电流不再表现出上述性质,而出现阶跃电流。用单扫描示波极谱法获得尖锐的导数峰。试验结果表明,此尖锐导数峰的出现与溶液中存在的EDTA、O 2 及某些阴离子有关。当EDTA和O 2 浓度固定时,其大小和位置与阴离子性质及浓度有关。我们曾运用这个方法测定了发光材料钨酸钙中的微量氯。 Oxygen maximum is usually maxima of the first kind. The magnitude of the current correspond to Ohm’s Law. This paper reports Oxygen maximum to apear abnormal phenomena in the psesence of low concentration of EDTA and the current doesn’t show above property, but it apeares step currant. The sharp derivative peak is obtained by single sweep oscillographic polarography. The result of test shows that apearence of sharp derivative peak to relate to EDTA, O 2 and some anions in solution. when concentration of EDTA and O 2 are unchanged the magnitude of peak current and peak potential relates to anionic property and concentration. We have used this method to determine trace chloride in the light material of calcium tungstate. 1986-04-01 2021-04-01 4