氟虫腈在两种土壤中的降解过程中没有立体选择性
氟虫腈对映体在蚯蚓体内有明显的对映体选择性
氟虫腈对映体在蚯蚓体内有明显的对映体选择性
刘东晖
氟虫腈在蚯蚓体内的选择性急性毒性、富集和降解行为[EB/OL]
北京：中国科技论文在线
富集过程未发现明显的对映体选择性
富集过程发现微弱的对映体选择性
发现氟虫腈对映体对蚯蚓的急性毒性有明显的差异
） Abstract： In this study, the enantioselectivities of individual enantiomers of fipronil in acute toxicity and degradation in earthworm tissue and soil (the natural soil and the artificial soil) was studied
Acute toxicity test, after 72 h and 96 h of exposure, the calculated LC50 (72 h) values of the R-(-)-form, rac-form, and S-(+)-form were 0
0289 mg/cm2, 0
0445 mg/cm2, 0
0499 mg/cm2, resplctively, and the calculated LC50 (96 h) values of the R-(-)-form, rac-form, and S-(+)-form were 0
0149 mg/cm2, 0
0194 mg/cm2, 0
0365 mg/cm2
The results show that the acute toxicity of fipronil enantiomers was enantioselective
During the bioaccumulation experiment, the enantiomer fraction in earthworm tissue in the natural soil was maintained approximately at 0
5, whereas enantiomer fraction in the artificial soil was higher than 0
5
In other words, the bioaccumulation of fipronil was enantioselective in earthworm in the artificial soil
During the elimination experiment, both in the natural soil and the artificial soil, the concentration of R-(-)-fipronil was higher than S-(+)-form
