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RESEARCH PRODUCT

Determination of tannic acid by direct chemiluminescence in a FIA assembly

J. Martínez CalatayudB. Gómez-taylor CorominasJ. V. García MateoL. Lahuerta Zamora

subject

AnalyteChromatographyDosage formAnalytical Chemistrylaw.inventionchemistry.chemical_compoundPotassium permanganatechemistrylawTannic acidPhenolsPerchloric acidQuantitative analysis (chemistry)Chemiluminescence

description

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 mug 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.

yearjournalcountryeditionlanguage
2002-12-06Talanta
https://doi.org/10.1016/s0039-9140(02)00410-1