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Determination of thiocyanate by carbonyl sulphide (OCS) generation and gas-phase molecular absorption spectrometry

✍ Scribed by S.Cabredo Pinillos; I.Sanz Vicente; J.Galbán Bernal; J.Sanz Asensio

Publisher: Elsevier Science
Year: 1996
Tongue: English
Weight: 523 KB
Volume: 318
Category: Article
ISSN: 0003-2670
DOI: 10.1016/0003-2670(95)00463-7

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✦ Synopsis

A method for determination of thiocyanate by gas-phase molecular absorption spectrometry is described. The proposed method is based on the continuous generation of carbonyl sulphide and preconcentration in a liquid nitrogen trap. Later, the product is volatilised and the absorbance at 224 nm is measured. Under the optimised conditions, the calibration graph was linear for 2-80 pg ml-', with a detection limit of 1 pg ml-'. No metal ions interfered. The method was tested with saliva samples from non-smokers and smokers; the results show that it is possible to distinguish between these two categories of individuals.

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