ISO 13885-3:2020 凝胶渗透色谱（GPC） 第3部分：水作为洗脱剂

标准编号：ISO 13885-3:2020

中文名称：凝胶渗透色谱（GPC） 第3部分：水作为洗脱剂

英文名称：Gel permeation chromatography (GPC) — Part 3: Water as eluent

发布日期：2020-07

标准范围

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 water by gel permeation chromatography (GPC).
NOTE Also known as size exclusion chromatography (SEC).
This method is applicable to neutral polymers and polyanions (e.g. polycarboxylates,
polysaccharides, fully hydrolyzed polyvinyl alcohols and high-molecular polyethylene oxides).
It is not applicable to polycations [e.g. polyvinylpyrrolidone, polyvinylpyridine, salts of
poly(diallyl-N,N-dimethyl-azacyclopentane), chitosan].
Despite good solubility in the mobile phase and 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 (see also Clause 12).
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 methods (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.
 

标准预览图