Gas chromatographic determination of phenol compounds with automatic extraction and derivatization.
Two gas chromatographic procedures for the determination of a variety of substituted phenols in water samples are described. The phenols were extracted or extracted-derivatized by using a continuous liquid-liquid extraction-derivatization system and quantified with flame ionization detection. Ethyl acetate was found to be the most efficient solvent for phenols whereas n-hexane yielded essentially the same recoveries for derivatized phenols. Between 0.1 and 300 mg/l of the different phenols can be detected with a relative standard deviation 1.1 and 3.7%. The acetate esters of six phenols were formed by the direct addition of acetic anhydride to the organic extractant. The stable acetate esters thus formed were isolated by using a standard dimethyl polysiloxane gas chromatographic column.
Ballesteros
E
E
Department of Analytical Chemistry, Faculty of Sciences, University of Córdoba, Spain.
Gallego
M
M
Valcárcel
M
M
D002733:Chlorophenols / Q000032:analysis; D002849:Chromatography, Gas / Q000295:instrumentation / Q000379:methods*; D003408:Cresols / Q000032:analysis; D004952:Esters / Q000378:metabolism; D010636:Phenols / Q000032:analysis* / Q000378:metabolism
D002733:Chlorophenols; D003408:Cresols; D004952:Esters; D010636:Phenols