光散射技术在4．5％高效氯氰菊酯水乳剂物理稳定性研究中的应用  

Application of light scattering technology for studying the physical stability of beta-cypermethrin 45EW

作　　者：郭勇飞[1] 尹明明[1] 陈福良[1] 

机构地区：[1]农业部农药化学与应用重点开放实验室,中国农业科学院植物保护研究所,北京100193

出　　处：《农药学学报》2010年第1期79-84,共6页Chinese Journal of Pesticide Science

基　　金：中央级公益性科研院所基本科研业务费专项资金(2009YW08);“十一五”国家科技支撑计划(2006BAD08A03)

摘　　要：证明了将光散射技术用于评价水乳剂稳定性的可行性。通过4.5%高效氯氰菊酯水乳剂配方的研制,证明了来自Turbiscan Lab分散稳定性分析仪的稳定性参数(SI)可以作为水乳剂稳定性判定的量化指标,其结果与传统的热贮稳定性和冻融稳定性试验结果一致,SI<4.0的4.5%高效氯氰菊酯水乳体系具有稳定性。此外,正交试验结果表明,乳化剂配比对体系的稳定性影响最大,水质和共乳化剂用量的影响相对较小且差异不显著。选定乳化剂配比后,水质和共乳化剂对体系物理稳定性的影响是协同作用的结果,水质可以在较宽的范围内选择,因而可用自来水配制合格的4.5%高效氯氰菊酯水乳剂。By means of light scattering technology, Stability Index （SI） from Turbiscan Lab Dispersion-stability Analyzer can be used as quantitative indicator to evaluate the stability of preparing beta-cypermethrin 4SEW, and the results from SI were in consistency with those of high temperature and freeze-thaw stability test. When SI of beta-cypermethrin 4SEW was below 4.0, the emulsion system was found to be stable. Furthermore, the results of the orthogonal experiment indicated that the emulsifier ratio was the most important factor that affect the stability of EW, while co-emulsifier content and water quality had less effect, and the difference of the effects of co-emulsifier content and water quality was not significant. When emulsifier ratio was selected, water quality and co-emulsifier had synergetic effects on physical stability of beta-cypermethrin 4SEW. Water with wide range of quality, including tap water, can be used to prepare the beta-cypermethrin 45EW.

关 键 词：水乳剂 物理稳定性 光散射技术 Turbiscan Lab分散稳定性分析仪 正交试验 

分 类 号：TQ450.6[化学工程—农药化工] S482.39[农业科学—农药学]