Strategies for Supercritical Fluid Extraction of Polar and Ionic Compounds

  1. Luque De Castro, M.D. 1
  2. Tena, M.T. 1
  1. 1 Department of Analytical Chemistry, University of Córdoba, E-14004 Córdoba, Spain
Revista:
TrAC. Trends in Analytical Chemistry Regular ed.

ISSN: 0165-9936

Any de publicació: 1996

Volum: 15

Número: 1

Pàgines: 32-37

Tipus: Article

DOI: 10.1016/0165-9936(96)88035-6 SCOPUS: 2-s2.0-0030028310 DIALNET GOOGLE SCHOLAR

Altres publicacions en: TrAC. Trends in Analytical Chemistry Regular ed.

Repositori institucional: lock_openAccés obert Editor

Resum

The methods used to facilitate the supercritical fluid extraction (SFE) of polar and ionic compounds are based on two general principles, either increasing the polarity of the supercritical fluid (SF) (usually CO2) used as extractant or reducing the polarity of the analytes to be leached from the solid matrices. Changes in the pressure and temperature of the SF, the use of SFs more polar than CO2 or of modified CO2, ion pair formation, esterification, the use of and organometallics, or complex formation are the most common ways of increasing the extraction efficiency for polar and ionic analytes.