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Piezoelectric determination of traces of thiourea

✍ Scribed by S.Z. Yao; F.J. He; L.H. Nie

Publisher: Elsevier Science
Year: 1992
Tongue: English
Weight: 318 KB
Volume: 268
Category: Article
ISSN: 0003-2670
DOI: 10.1016/0003-2670(92)85226-v

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✦ Synopsis

A method was developed for the determmatlon of thlourea based on the reaction of the latter wrth a solution of lodme m carbon tetrachlorlde at pH 7, followed by measurmg the frequency change of a gold-plated plezoelectnc crystal caused by the unreacted mdme The frequency change IS proportional to thlourea concentration over the range 1 X lo-'-6 X 10e6 mol I-' (7 6-457 ng ml-') The relative standard deviation was 1 4% for SIX measurements of 6 X lo-' mol 1-l (46 ng ml-') thlourea

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