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前言在凝胶渗透色谱(GPC)中,为了把原始谱图数据转换成各种平均分子量和分子量分布值,必须进行校正。通常使用的校正方法有两种:①窄分布标样校正法。使用七到八个窄分布的聚合体标样,它们的重均分子量_w与数均分子量_n 之比小于1.10。用这些标样进行 GPC 测定,从峰值找到各个标样的淋出体积 V_e。以标样分子量的对数(logM)对 V_e作图,可以得到校正曲线(即 logM—V_e 直
Introduction In gel permeation chromatography (GPC), the calibration must be performed in order to convert raw spectral data to various mean molecular weight and molecular weight distribution values. There are two commonly used calibration methods: ① narrow calibration standard calibration method. Using seven to eight narrowly distributed polymer standards, their ratio of weight average molecular weight _w to number average molecular weight _n is less than 1.10. GPC measurements were performed with these standards and the leaching volume V_e for each standard was found from the peak. The logarithm of the standard molecular weight (logM) of V_e mapping, you can get the calibration curve (ie logM-V_e straight