FLOW-INJECTION FLUOROMETRIC-DETERMINATION OF ASCORBIC-ACID BASED ON ITS PHOTOOXIDATION BY THIONINE BLUE

Authors
PEREZRUIZ T MARTINEZLOZANO C TOMAS V SIDRACH C
Citation
T. Perezruiz et al., FLOW-INJECTION FLUOROMETRIC-DETERMINATION OF ASCORBIC-ACID BASED ON ITS PHOTOOXIDATION BY THIONINE BLUE, Analyst, 122(2), 1997, pp. 115-118
Citations number
42
Categorie Soggetti
Chemistry Analytical
Journal title
Analyst → ACNP
ISSN journal
00032654
Volume
122
Issue
2
Year of publication
1997
Pages
115 - 118
Database
ISI
SICI code
0003-2654(1997)122:2<115:FFOABO>2.0.ZU;2-N
Abstract
The photooxidation of ascorbic acid sensitized by Thionine Blue was st udied. The Leucothionine Blue formed during the reaction is highly flu orescent. 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 ascorbi c acid in pharmaceuticals, fruit juices and soft drinks.