聚乙醇酸切片中端羧基含量的测定

Determination of End Carboxyl in PGA Chip

采用滴定法测定PGA切片中的端羧基含量,对样品前处理、溶剂类型、方法精密度等进行了研究。得到最佳条件为:样品为0.175mm颗粒,溶剂为DMSO。验证实验结果表明,平行性和准确性都很好,RSD为3.45%。用该方法测定PGA切片中的端羧基含量,具有结果准确、方法简便等优点。

The end carboxyl content in PGA chips was determined by titration.The analysis conditions,such as the sample pretreatment,solvent type and precision of the method were studied.The analysis conditions were optimized as followed:0.175mm particles,the solvent was DMSO.The results showed good accuracy and parallelism with relative standard deviation value of 3.45%.