利用液相色谱–质谱联用技术研究二元表面活性剂体系–啶虫脒微乳剂热贮稳定性

应用液相色谱–质谱联用技术评价复配的阴/非离子二元表面活性剂复合体系–啶虫脒微乳剂的热贮稳定性。将二元表面活性剂复合体系–啶虫脒微乳剂于(54±2)℃下贮藏14天,取出后于室温下干燥24 h,用液相色谱–质谱联用仪测定啶虫脒含量。该法线性拟合方程为y=97 060.72x+542 587.4,线性范围为0.01~0.25 mg/L,相关系数为0.999 8。方法检出限为0.001 mg/L(S/N=3),色谱保留时间和色谱峰面积重复性分别为0.31%,1.44%(n=6),加标回收率为86.23%~107.20%。该法具有简单、准确和灵敏的特点。

Study on Stability of Thermal Storage in Binary Ionic/Nonionic Surfactants-Acetamiprid Microemulsion by LC-MS

Study on thermal storage stability of binary ionic/nonionic surfactants-acetamiprid microemulsion was developed by LC-MS. After being stored for 14 day at (54±2)℃ , the binary ionic/nonionic surfactants-acetamiprid mi-croemulsion was dried for 24 h at room temperature, and acetamiprid in it was determined by LC-MS. The results showed good linearity with linear equation of y=97060.72x+542587.4, ranging from 0.01 mg/L to 0.25 mg/L, the correlation coefficient was 0.9998. The detection limit was 0.001 mg/L. The repeatability of chromatograph retention time and peak area was 0.31％ and 1.44％(n=6), respectively. The standard recoveries were between 86.23％ and 107.20％. The method is simple, reliable and sensitive.