DETERMINATION OF ELEMENTAL SULFUR, MERCAPTAN AND DISULFIDE IN PETROLEUM NAPHTHA BY DIFFERENTIAL-PULSE POLAROGRAPHY

被引：8

作者：

GUINON, JL

MONZO, J

GARCIAANTON, J

URENA, C

COSTA, J

机构：

[1] Departmento Ingeniería Química y Nuclear E.T.S.I. Industriales, Universidad Politécnica de Valencia, Valencia, E-46071

来源：

FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY | 1990年 / 337卷 / 04期

关键词：

D O I：

10.1007/BF00322214

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The polarographic behaviour of elemental sulfur, mercaptan and disulfide in 0.032 mol/l sulfuric acid-ethanolnaphtha is described. The peak potentials for elemental sulfur and mercaptan are about 200 mV apart, which allows simultaneous determination of these compounds. The calibration plot is linear up to 1 mg·1-1 for elemental sulfur and it is a curve depending on molecular weight for mercaptan. The disulfide present a peak close to the peak of the mercaptans but with a lower sensitivity and therefore they do not interfere. The polarographic properties, diffusion, reversibility and electrocapillary curves are discussed. © 1990 Springer-Verlag.

引用

页码：372 / 376

页数：5

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