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 C 18-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 μl allow detection down to 2 μg/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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