超高效液相色谱法测定聚丙烯中成核剂

Determination of nucleating agents in polypropylene through ultra high performance liquid chromatography

采用超高效液相色谱(UPLC)法对聚丙烯(PP)材料中5种不同性质的成核剂进行了分析,研究了样品前处理对提取效率的影响因素,对比了加热提取、超声提取和微波辅助提取(MAE)的效果,结果表明MAE对各种性质差异较大的PP均表现出良好的提取效果。方法以ACQUITY BEH C18(50 mm×2.1 mm,1.7μm)柱分离,乙腈和水作为流动相,紫外检测波长213 nm;外标曲线相关系数>0.995,在5~300 mg/L之间有良好的线性关系,方法的回收率在83.4%~113.1%之间,相对标准偏差(n=9)在0.9%~7.9%之间。该方法适用于PP材料中成核剂的可靠检测。

In this study,five nucleating agents with different properties in polypropylene(PP)were analyzed by using ul⁃tra high performance liquid chromatography(UPLC).The factors affecting the extraction efficiency of sample pretreat⁃ment were studied,and the effects of heating extraction,ultrasonic extraction,and microwave⁃assisted extraction(MAE)were investigated.The results indicated that MAE generated a good extraction effect on PP with different prop⁃erties.In this extraction method,the ACQUITY BEH C18(50 mm×2.1 mm,1.7μm)column was used for separa⁃tion,acetonitrile and water were used as mobile phases,and the UV detection wavelength was set to be 213 nm.The correlation coefficient of external standard curve was>0.995,indicating a good linear relationship between 5 and 300 mg/L.This method presented a recovery ranging from 83.4%to 113.1%along with a relative standard deviation(n=9)varying from 0.9%to 7.9%.The method developed in this study is suitable for the reliable detection of nucleating agents in PP.