[采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].

作者信息

Zhang Xiao-Jun, Feng Jian-Guo, Liu Shang-Zhong, Wu Xue-Min

机构信息

Department of Applied Chemistry, China Agricultural University, Key Laboratory of Pesticide Chemistry and Application, Ministry of Agriculture, Beijing 100193, China.

出版信息

Guang Pu Xue Yu Guang Pu Fen Xi. 2013 Feb;33(2):423-7.

PMID:23697125

Abstract

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 350 g x L(-1) suspension concentrate in the same preparation condition. By measuring the light intensity of backscattering light of the suspension of imidacloprid 350 g x 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.

摘要

采用Turbiscan Lab Analyzer研究了农药悬浮剂（SC）的稳定性。Turbiscan Lab可用于分析浓缩胶体、分散剂样品以及悬浮体系初期的不稳定机制。它还能测定沉降厚度随时间的变化、颗粒沉降速率随时间的变化以及粒径随时间的变化。在本研究中，在相同制备条件下，使用不同的分散剂GY-D10、NNO、Morwet D-425、TERSPERSE 2425制备350 g·L⁻¹吡虫啉悬浮剂。通过测量350 g·L⁻¹吡虫啉SC悬浮液的背散射光强度随时间的变化，研究了反映SC悬浮剂稳定性的动态沉降过程和粒径变化。结果表明，当SC中GY-D10分散剂的含量为4 wt%时，SC悬浮体系的稳定性相对较好。