DIN 55672-2-2008 凝胶渗透色谱法(GPC).第2部分:用N,N-二甲基乙酰胺(DMAC)作洗脱溶剂

标准号：DIN 55672-2-2008
中文标准名称：凝胶渗透色谱法(GPC).第2部分:用N,N-二甲基乙酰胺(DMAC)作洗脱溶剂
英文标准名称：Gel permeation chromatography (GPC) - Part 2: N,N-Dimethylacetamide (DMAC) as elution solvent
标准类型：G63
发布日期：1999/12/31 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：G63
国际标准分类号：71.040.50
引用标准：DIN 55672-1-2007;DIN EN ISO 1513;DIN EN ISO 15528;DIN ISO 5725-1
适用范围：This standard describes the determination of the molecular weight distribution, number-average molecularweight Mr and weight-average molecular weight Mw of polymers that are soluble in DMAC (N,N-dimethylacetamide) by gel permeation chromatography (GPC).It is possible that, in spite of the good repeatability of the chromatograms obtained, this method cannot beused with certain polymer types because of specific interactions (e.g. adsorption) within the sample/eluent/-column system.The method is not an absolute one and requires calibration with commercially available unbranchedpolymethyl methacrylate standards that have been characterized by independent absolute methods. Theresults for samples of polymers other than polymethyl methacrylate are therefore only comparable withingroups of samples of the same type.The conditions specified in this standard are not suitable for the GPC analysis of polymer samples with Mwvalues greater than 10~6 g/mol (see Annex C).No correction methods (e.g. for the elimination of peak broadening) are included in this standard. If absolutemolecular weight values are required, an absolute method (e.g. membrane osmometry for Mn or lightscattering for Mw) shall be used.