COMPARISON BETWEEN SUPERCRITICAL-FLUID EXTRACTION (SFE) USING CARBON-DIOXIDE ACETONE AND CONVENTIONAL SOXHLET EXTRACTION WITH TOLUENE FOR THE SUBSEQUENT DETERMINATION OF PCDD PCDF IN A SINGLE ELECTROFILTER ASHSAMPLE/

Authors
DOLEZAL IS SEGEBARTH KP ZENNEGG M WUNDERLI S
Citation
Is. Dolezal et al., COMPARISON BETWEEN SUPERCRITICAL-FLUID EXTRACTION (SFE) USING CARBON-DIOXIDE ACETONE AND CONVENTIONAL SOXHLET EXTRACTION WITH TOLUENE FOR THE SUBSEQUENT DETERMINATION OF PCDD PCDF IN A SINGLE ELECTROFILTER ASHSAMPLE/, Chemosphere, 31(9), 1995, pp. 4013-4024
Citations number
20
Categorie Soggetti
Environmental Sciences
Journal title
Chemosphere → ACNP
ISSN journal
00456535
Volume
31
Issue
9
Year of publication
1995
Pages
4013 - 4024
Database
ISI
SICI code
0045-6535(1995)31:9<4013:CBSE(U>2.0.ZU;2-4
Abstract
A single electrofilter ash sample from a municipal waste incinerator w as analyzed for PCDD/PCDF. Different pretreatment procedures (chemical : sulfuric acid/no acid; mechanical: ground/not ground) were performed with two independent but identical samples each were subsequently Sox hlet extracted with toluene or subjected to SFE. It was shown, that an acid treatment subsequently combined with SFE gives the most favourab le extraction efficiency. Consequently a severe underestimation of PCD D/PCDF concentrations can result from SFE extraction without prelimina ry acid treatment of the ash.