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 ASH SAMPLE

被引：9

作者：

DOLEZAL, IS

SEGEBARTH, KP

ZENNEGG, M

WUNDERLI, S

机构：

[1] Department of Organic Chemistry Swiss Federal Laboratories for Materials Testing and Research

来源：

CHEMOSPHERE | 1995年 / 31卷 / 09期

关键词：

POLYCHLORINATED DIBENZO-P-DIOXINS (PCDD); POLYCHLORINATED DIBENZOFURANS (PCDF); SUPERCRITICAL FLUID EXTRACTION (SFE); MATRIX MODIFICATION; INCINERATOR ASH; FLY ASH; ELECTROFILTER ASH; WASTE;

D O I：

10.1016/0045-6535(95)80002-3

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A single electrofilter ash sample from a municipal waste incinerator was 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 Soxhlet extracted with toluene or subjected to SFE. It was shown, that an acid treatment subsequently combined with SFE gives the most favourable extraction efficiency. Consequently a severe underestimation of PCDD/PCDF concentrations can result from SFE extraction without preliminary acid treatment of the ash.

引用

页码：4013 / 4024

页数：12

共 20 条

[1] CLEANUP OF COMPLEX ORGANIC MIXTURES USING SUPERCRITICAL FLUIDS AND SELECTIVE ADSORBENTS [J].