Determination of tannic acid by direct chemiluminescence in a FIA assembly

The determination of tannic acid is performed in a FIA assembly on the basis of the analytical output obtained by oxidation of the acid. The analyte solution was daily prepared in a mixture of quinine as sensitiser and perchloric acid and it was injected into a pure water stream acting as a carrier....

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Bibliographic Details
Published in:Talanta (Oxford) 2002-12, Vol.58 (6), p.1243-1251
Main Authors: Gómez-Taylor Corominas, B, Garcı́a Mateo, J.V, Lahuerta Zamora, L, Martı́nez Calatayud, J
Format: Article
Language:English
Subjects:
Analysis
Biological and medical sciences
Chemiluminescence
Continuous-flow procedures
FIA
General pharmacology
Medical sciences
Pharmaceuticals
Pharmacology. Drug treatments
Tannic acid
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Summary:The determination of tannic acid is performed in a FIA assembly on the basis of the analytical output obtained by oxidation of the acid. The analyte solution was daily prepared in a mixture of quinine as sensitiser and perchloric acid and it was injected into a pure water stream acting as a carrier. This solution merges with the mixture potassium permanganate in perchloric medium and the resulting chemiluminescence is monitored. The method was applied over the range 0.5–20 mg l −1 of tannic acid with a LOD 100 μg l −1. The reproducibility was 2.1% and the sample throughput 54 h −1. The influence of foreign substances was studied and the new method is applied to the determination of tannic acid in pharmaceutical and galenic formulations in human urine and surface waters.
ISSN:0039-9140
1873-3573
DOI:10.1016/S0039-9140(02)00410-1