利用多重光散射技术研究吡虫啉悬浮剂的物理稳定性  

Physical Stability of Imidacloprid Suspension Concentrate Studied by the Multiple Light Scattering Technique

作　　者：张小军[1] 冯建国[1] 刘尚钟[1] 吴学民[1] 

机构地区：[1]中国农业大学应用化学系,农业部农药化学与应用重点开放实验室,北京100193

出　　处：《光谱学与光谱分析》2013年第2期423-427,共5页Spectroscopy and Spectral Analysis

基　　金：国家"十二五"科技支撑计划项目(2011BAE06B03;2011BAE06A06-10)资助

摘　　要：Turbiscan Lab稳定性分析仪利用多重光散射技术,能够准确测量乳状液、悬浮液等沉淀层、浮油层或澄清层厚度以及粒子平均粒径随时间的变化情况,定性定量分析体系不稳定性发生的机理和速率。本文利用Turbiscan Lab稳定性分析仪测定了不同萘磺酸盐分散剂GY-D10,NNO,Morwet D-425,TER-SPERSE 2425制备的350g.L-1吡虫啉悬浮剂及其悬浮液背散射光强度随时间的变化情况以及颗粒平均粒径的聚结增大速率,同时利用激光粒度分析仪测定加速试验前后颗粒平均粒径的变化情况,结果表明:添加分散剂GY-D10,用量为4Wt%时悬浮液的稳定性最好,对应的吡虫啉悬浮剂的稳定性也最好。The stability of pesticide SC suspension was studied by Turbiscan Lab Analyzer. The Turbiscan Lab can be used to analyze the concentrated colloids, dispersant samples, and the instable mechanism of the suspension system in the initial stage. The Turbiscan Lab can also determine the thickness changes of sedimentation with the time, the settling rate of particles with time, and the particle size changes with time. In the present work, the different dispersant GY-D10, NNO, Morwet D-425, TERSPERSE 2425 were used to prepare the imidacloprid 350g·L^-1 suspension concentrate in the same preparation condition. By measuring the light intensity of backscattering light of the suspension of imidacloprid 350 g·L^-1 SC with time, the dynamic sedimentation processes and the particle size changes which reflect the stability of SC suspension were studied. The results showed that when the contents of GY-D10 dispersant were 4 wt% in the SC, the stability of SC suspension system was relatively good.

关 键 词：TURBISCAN Lab分析仪 悬浮剂 分散剂 物理稳定性 

分 类 号：O644.1[理学—物理化学]