^(14)C-绿黄隆结合残留物的超临界流体提取及鉴定

Supercritical fluid extraction of ^(14)C-chlorsulfuron bound residues and their identification

采用超临界甲醇提取14C－绿黄隆结合残留物时，在超临界状态下维持30min，提取效率可达85．82％。对绿黄隆经超临界流体提取处理产生的分解产物进行TGC－MS分析。对仅含结合态14C－绿黄隆结合残留物的样品进行超临界流体提取处理时，释放出的14C－结合残留物会进一步发生分解。

Supercritical methanol was used to extract 14C-chlorsulfuron bound residues.When the SFE process was maintained for 30 minutes, 87.82% of total bound residues was found to be extracted. Whether the soil matrix was present or not, chlorsulfuron would be decomposed after the SFE process, and the decomposed products were then subjected to GC-MS analysis for identification. When the soil samples which contained only 14C-chlorsulfuron bound residues were processed by SFE, the released 14C-residues would be further decomposed.