Flow injection analysis determination of ascorbic acid with spectrofluorimetric detection

Authors: Ali A Ensafi, B Rezaei

Publication date: 1998/1/1

Journal name: Analytical letters

Volume: 31

Pages: 333-342

Publisher:: Taylor & Francis Group

Abstract A flow injection system for the fluorescence determination of low level of ascorbic
acid is proposed. The method is based on the rapid oxidation of ascorbic acid by thallium (I).
The fluorescence signal at 419 nm is proportional to the amount of ascorbic acid in the
range of (1.4–28.0)× 10− 7 mole. The relative standard deviations for ten replicate
measurements of 1.4× 10− 6 mole of ascorbic acid was 1.3%. The sample rate of 45±5
sample per hour was achieved. The usefulness of the method was tested in the ...