【摘要】 采用RHPLC法,用甲醇:水作流动相,用示差检测器,对聚醚型非离子表面活性剂中游离聚乙二醇(PEG)进行了测定,方法最大相对标准偏差低于5％。同时考察了PEG分子量(100～4000)对其保留时间和响应值的影响。更多还原

【Abstract】 A rapid quantitative RHPLC method for PEG is studied in this paper. The by-product PEG in polyethoxylated nonionics is determined completely with mobil - phase methanol - water and refractive detector. The maximum relative standard deviation is smaller than 5. 0%. The influences of molecular mass of PEG (100-4 000) on their retention time and response are investigated.更多还原