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Determination of low thiourea concentrations in industrial process water and natural samples using reversed-phase
J Rethmeie1, G Neumann, C Stumpf
1Eco.carbon GmbH, Berlin, Germany. rethmeier@ecocarbon.de
Abstract:
A rapid LC method was developed to determine thiourea in natural samples and freshly prepared as well as used tin-baths from the galvanic industry, with LC on a C18-bonded silica column and with doubly distilled water as eluent. The retention time of thiourea is 1.35 min +/- 5%. UV detection is at 236 nm. Small sample volumes of 10-50 microl allow detection down to 2 microg/l thiourea without any interference by heavy metals or organic compounds and in the case of marine samples by mineral salts. The presented technique should be highly useful for industrial purposes.
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