PET生产循环用乙二醇含量分析方法

Analysis method of circulation ethylene glycol content in PET production

建立了用气相色谱法测定PET循环用乙二醇含量的分析方法,采用能耐水并使乙二醇与其他杂质分离的石英毛细柱SE-30,60 m×0.50 mm×3μm。结果表明:该方法的准确度回收率为95.20%~101.3%;精密度标准偏差为:1.317 2%;变异系数为1.45%。

An analytical method for determination the circulation ethylene glycol content in polyester by gas chroma- tography was established. The Quartz capillary column SE-30,60 m× 0. 50 mm× 3 μm capable of resisting water and separating ethylene glycol .from other impurities was used. The results showed that the accuracy of the method was 95.20% to 101.3%, and the standard deviation of precision was： （ 1. 317 2）, and the coefficient of variation was about 1.45%.