ISO 19929:2017规定了通过基质辅助激光解吸/电离飞行时间质谱（MALDI-TOF-MS）测定聚乙二醇（PEG）及其不同端基衍生物的平均分子量和混合比的通用方法。适用于分子量从500 g mol？1至20 000克摩尔？1.通过使用标准聚合物混合物构建的校准曲线计算组成，其中绘制峰面积比相对于质量比。该文献可应用于具有类似于PEG的单体单元的其它聚合物。

ISO 19929:2017 specifies a general method for determining the average molecular mass and mixture ratio of poly(ethylene glycol) (PEG) and its derivatives with different end groups by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS). It is applicable to PEG and its derivatives with molecular masses from 500 g mol^？1 to 20 000 g mol^？1. The composition is calculated by means of a calibration curve constructed using standard polymer mixtures, where the peak area ratio is plotted versus the mass ratio. This document can be applied to other polymers with monomeric unit similar to PEG.