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
收藏
页码：115 / 118
页数：4
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