使用Ｃ１８反相液相色谱柱，以乙腈和水作为流动相，以甲基磺酸作为离子对试剂，并加入高氯酸钠以增强离子强度，采用等度洗脱，建立了单体反应物原位聚合型（ＰＭＲ型）的聚酰亚胺树脂溶液中单体成分分析的反相离子对抑制液相色谱法。并对树脂单体材料的纯度以及ＰＭＲ型树脂溶液中的单体及单体异构体成分进行了分析。 C18 reversed-phase liquid chromatography with acetonitrile and water as the mobile phase, methanesulfonic acid as the ion pair reagent, and sodium perchlorate to enhance the ionic strength, the use of isocratic elution to establish a monomer reaction Inverse Polymerization Inhibition Liquid Chromatography for Monomer Composition Analysis of in situ Polymerization (PMR) Polyimide Resin Solutions. The purity of the resin monomer and the monomer and monomer isomers in the PMR resin solution were also analyzed.