University of North Florida
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Stuart Chalk, Ph.D.
Department of Chemistry
University of North Florida
Phone: 1-904-620-1938
Fax: 1-904-620-3535
Website: @unf

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Classification: Fruit -> citrus -> peel

Citations 1

"Flow Injection Fluorimetric Determination Of Thiourea"
Talanta 1995 Volume 42, Issue 3 Pages 391-394
Tomás Pérez-Ruiz*, Carmen Martínez-Lozano, Virginia Tomás and Rocio Casajús,

Abstract: A flow injection configuration for the fluorimetric determination of thiourea is presented. The method is based on the rapid oxidation of thiourea by Tl(III) with resultant formation of fluorescent Tl(I), which was measured at 419 nm (excitation at 227 nm). The calibration graph was linear from 0.5-10 µM with a sampling rate of 90 samples/h. RSD were 1.2-2.3% (n = 10). The method was applied to the determination of thiourea in citrus fruit juices and fruit peels. Recoveries were 95.6-100.5%.
Thiourea Fluorescence Indirect