Flow injection fluorimetric determination of ascorbic acid based on its photooxidation by thionine blue

被引：20

作者：

PerezRuiz, T

MartinezLozano, C

Tomas, V

Sidrach, C

机构：

[1] Department of Analytical Chemistry, Faculty of Chemistry, University of Murcia

来源：

ANALYST | 1997年 / 122卷 / 02期

关键词：

flow injection; fluorescence; photooxidation; ascorbic acid; Thionine Blue; pharmaceuticals; fruit juices;

D O I：

10.1039/a606841c

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The photooxidation of ascorbic acid sensitized by Thionine Blue was studied. The Leucothionine Blue formed during the reaction is highly fluorescent. A flow injection method using merging zones is proposed for the determination of ascorbic acid over a concentration range from 8 x 10(-7) to 5 x 10(-5) mol l(-1) with a throughput of 80 samples per h. The method was used for the simple and rapid determination of ascorbic acid in pharmaceuticals, fruit juices and soft drinks.

引用

页码：115 / 118

页数：4

共 42 条

[11] SENSITIVE FLOW-INJECTION TECHNIQUE FOR THE DETERMINATION OF DISSOLVED ORGANIC-CARBON IN NATURAL AND WASTE-WATERS [J].