COULOMETRIC TITRATION OF OLEFINIC UNSATURATION IN FATTY-ACIDS WITH BROMINE IN PROPYLENE CARBONATE

被引：7

作者：

CHENEY, MC ^{[1
]}

FLETCHER, KS ^{[1
]}

机构：

[1] FOXBORO CO,CORP RES,FOXBORO,MA 02035

来源：

ANALYTICAL CHEMISTRY | 1979年 / 51卷 / 07期

关键词：

D O I：

10.1021/ac50043a008

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The application of propylene carbonate and a 1:2 chloro-form-propylene carbonate mixture as solvents for coulometric bromination of olefinic unsaturation of fatty acids has been studied. A voltammetric investigation shows current-potential behavior attributable to both the Br3-/Br-and Br2/Br3- systems in these media. Ideal current efficiency for generation of Br2 and Br3- is demonstrated and a rapid procedure for the direct coulometric titration of several food oils using LiBr3 supporting electrolyte with potentiometric end-point detection is described. Titration results are comparable with those obtained by a less convenient standard volumetric procedure. © 1979, American Chemical Society. All rights reserved.

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页码：807 / 810

页数：4

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