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

  1. Cabredo Pinillos, S. 1
  2. Sanz Vicente, I. 1
  3. Galbán Bernal, J. 2
  4. Sanz Asensio, J. 1
  1. 1 Universidad de La Rioja
    info

    Universidad de La Rioja

    Logroño, España

    ROR https://ror.org/0553yr311

  2. 2 Universidad de Zaragoza
    info

    Universidad de Zaragoza

    Zaragoza, España

    ROR https://ror.org/012a91z28

Revista:
Analytica Chimica Acta

ISSN: 0003-2670

Any de publicació: 1996

Volum: 318

Número: 3

Pàgines: 377-383

Tipus: Article

DOI: 10.1016/0003-2670(95)00463-7 SCOPUS: 2-s2.0-0030025309 WoS: WOS:A1996TR97300015 GOOGLE SCHOLAR

Altres publicacions en: Analytica Chimica Acta

Repositori institucional: lock_openAccés obert Editor

Resum

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 μg ml-1, with a detection limit of 1 μg ml-1. 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.