本文件规定了通过凝胶渗透色谱法(GPC)测定可溶于DMAC(N，N-二甲基乙酰胺)的聚合物的摩尔质量分布和平均摩尔质量值Mn(数均)和Mw(重均)。 注意也称为尺寸排阻色谱法(SEC)。 尽管获得的色谱图显示出良好的重复性，但由于样品/洗脱液/柱系统内的特定相互作用（例如吸附），该方法可能不能用于某些聚合物类型。 本文件中规定的条件不适用于Mw值大于106 g/mol的聚合物样品和/或洗脱限度超出校准范围的聚合物的GPC分析（参见7.6和附录C）。 本文件不包括校正方法（例如，用于消除峰展宽）。如果需要绝对摩尔质量值，则可以使用绝对方法(例如Mn的膜渗透压法或Mw的光散射法)。

This document specifies the determination of the molar-mass distribution and the average molar mass values M_n (number average) and M_w (weight average) of polymers that are soluble in DMAC (N,N-Dimethylacetamide) by gel permeation chromatography (GPC). NOTE Also known as size exclusion chromatography (SEC). Even though the chromatograms obtained show good repeatability, it is possible that this method cannot be used with certain polymer types because of specific interactions (e.g. adsorption) within the sample/eluent/column system. The conditions specified in this document are not applicable to the GPC analysis of polymer samples with M_w values greater than 10⁶ g/mol and/or polymers with elution limits outside the calibration range (see 7.6 and Annex C). This document includes no correction method (e.g. for the elimination of peak broadening). If absolute molar mass values are required, an absolute method (e.g. membrane osmometry for M_n or light scattering for M_w) can be used.