Simultaneous determination of sulphide and sulphite by GPMAS. Comparative study of different calculation methods

  1. Pinillos, S.C. 1
  2. Vicente, I.S. 1
  3. Asensio, J.S. 1
  4. Galbán^Bernal, J. 2
  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:
Talanta (Oxford)

ISSN: 0039-9140

Año de publicación: 1995

Volumen: 42

Número: 7

Páginas: 937-943

Tipo: Artículo

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SCOPUS: 2-s2.0-0001597582 WoS: WOS:A1995RZ30200011 GOOGLE SCHOLAR

Otras publicaciones en: Talanta (Oxford)

Repositorio institucional: lock_openAcceso abierto Editor

Resumen

A method for the simultaneous determination of sulphide and sulphite is described, which involves continuous H 2S and SO 2 generation, preconcentration in a liquid nitrogen trap and measurement of the molecular absorption spectra of volatiles in the gas phase in 190-220 nm range. Under the recommended conditions (sample flow: 50 ml/min and concentrated sulphuric acid flow: 12 ml/min; generation time: 4 min) linear response ranges from 0.05 μg/ml for S 2- and 0.20 μg/ml SO 2- 3 are obtained with detection limits of 0.05 and 0.20 μg/ml respectively. Synthetic mixtures of the two components have been solved and a comparative study of different calculation methods has been made. In conclusion, multiwavelength methods offer better precision and accuracy. © 1995.