摘要
研究了两种β-环糊精的衍生物甲基-β-环糊精(MCD)和羟丙基-β-环糊精(HPCD)对甲基对硫磷的增溶作用和对紫外光降解的影响。结果表明:MCD和HPCD能增强甲基对硫磷的水溶性,在25℃下,20g/L的MCD和HPCD溶液中,甲基对硫磷溶解度比在纯水中分别提高了21.91和17.92倍;另外,3g/L、6g/LMCD和HPCD分别处理的甲基对硫磷,其光降解速率分别加快了4.87～6.85倍。增溶作用和光敏效应主要是由于MCD和HPCD与甲基对硫磷形成包合物引起的。
The effects of methylβcyclodextrin(MCD) and hydropropylβcyclodextrin(HPCD) on solubilization and photodegradation of parathionmethyl were investigated. The results showed that the solubility of parathionmethyl increased linearly with the increase of the derivatives of βcyclodextrin. The solubilization of parathionmethyl increased 21.91 and 17.92 times, respectively ,in the presence of 20 g/L MCD and HPCD under 25℃.In addition, MCD and HPCD increased the photodegradation of parathionmethyl. The photodegradation of parathionmethyl increased 4.87～6.85 times in the presence of 3 g/L and 6 g/L MCD and HPCD. The solubilization and light activation were caused by the formation of inclusion complexes of parathionmethyl with MCD and HPCD.
出处
《农药学学报》
CAS
CSCD
2003年第3期59-64,共6页
Chinese Journal of Pesticide Science
