Fiber Optic-Based Interface for On-Line Selective Photometric Determinations of Solid Samples by Supercritical Fluid Extraction

  1. Tena, M.T. 1
  2. Valcárcel, M. 1
  1. 1 Universidad de Córdoba
    info

    Universidad de Córdoba

    Córdoba, España

    ROR https://ror.org/05yc77b46

Aldizkaria:
Journal of Chromatography A

ISSN: 0021-9673

Argitalpen urtea: 1996

Alea: 753

Zenbakia: 2

Orrialdeak: 299-305

Mota: Artikulua

DOI: 10.1016/S0021-9673(96)00563-8 SCOPUS: 2-s2.0-0029969017 GOOGLE SCHOLAR

Beste argitalpen batzuk: Journal of Chromatography A

Gordailu instituzionala: lock_openSarbide irekia Editor

Laburpena

A novel windowless fiber optic-based flow-cell constructed from a drilled stainless steel block was used to link a supercritical fluid extractor and a spectrophotometer in order to obtain qualitative and quantitative information from the supercritical extract during the supercritical fluid extraction (SFE) process. The coupled system allows the process to be optimized in terms of extraction rate and extraction yield from the shape of the extraction curve and the area under it, respectively. The SFE of ground coffee samples was monitored spectrophotometrically and the suppression of the contribution of coextracted compounds to the analytical signal was demonstrated from derivative spectra.