Bs. De Martinis et Fm. Lancas, An alternative supercritical fluid extraction system for aqueous matrices and its application in pesticides residue analysis, J ENVIR S B, 35(5), 2000, pp. 539-547
Citations number
18
Categorie Soggetti
Environment/Ecology
Journal title
JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART B-PESTICIDES FOOD CONTAMINANTS AND AGRICULTURAL WASTES
Supercritical fluid extraction (SFE) is a rapid and convenient method for t
he isolation of organic compounds from environmental samples. This paper de
scribes a supercritical carbon dioxide (CO,) extraction system that uses a
newly designed extraction cell to recover organic compounds from an aqueous
matrix. Analysis of the extracts by gas chromatography-electron capture de
tector (GC-ECD) indicated that the herbicide trifluralin (2,6-dinitro-N,N-d
ipropyl-4-trifluoromethylaniline) could be quantitatively extracted by usin
g the SFE system proposed with small amounts of sample. The percentage of r
ecovery obtained with the SFE system described was twice as high as the res
ult obtained using a conventional solid-phase extraction technique. Extract
ion by SFE was completed in a short period of time using a simple and low-c
ost home-made system that did not require the use of organic solvents.