Yu Y L, Wu X M, Li S N, Fang H, Tan Y J, Yu J Q
Department of Plant Protection, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310029, People's Republic of China.
Chemosphere. 2005 May;59(7):961-7. doi: 10.1016/j.chemosphere.2004.11.009. Epub 2004 Dec 23.
To establish chemical extraction procedures for predicting bioavailability of butachlor and myclobutanil in soil, several solvent systems, including methanol, methanol-water (9:1), methanol-water (1:1), acetone-water (5:3), petroleum ether and water, were assessed for their feasibility in determining extractability of the target compounds from soil samples. Experimental data showed that the extractability of butachlor and myclobutanil by the solvents was well linearly correlated with their bioavailability to Eisenia foetida and Allolobophora caliginosa, indicating that these extraction procedures may be efficient for predicting bioavailability of the two pesticides. The concentrations of the pesticides accumulated in E. foetida and A. caliginosa varied with species, suggesting that the availability of the soil-sequestered pesticide is a species-dependent process.
为建立预测丁草胺和腈菌唑在土壤中生物有效性的化学提取程序，评估了几种溶剂体系，包括甲醇、甲醇 - 水（9:1）、甲醇 - 水（1:1）、丙酮 - 水（5:3）、石油醚和水，以确定其从土壤样品中提取目标化合物的可行性。实验数据表明，溶剂对丁草胺和腈菌唑的提取率与它们对赤子爱胜蚓和黑暗异唇蚓的生物有效性呈良好的线性相关，这表明这些提取程序可能有效地预测这两种农药的生物有效性。丁草胺和腈菌唑在赤子爱胜蚓和黑暗异唇蚓体内积累的浓度因物种而异，这表明土壤中农药的有效性是一个依赖物种的过程。
