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Data Reduction in Size-Exclusion Chromatography with Molar Mass Sensitive Detectors

机译:具有摩尔质量敏感探测器尺寸排除色谱的数据减少

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A comprehensive analysis of recent improvements in data reduction in triple-detector SEC is presented. Using direct measurements of a sample's hydrodynamic volume across the entire polymer distribution, different sources of non-ideality of size-exclusion separation can be analyzed as well as their effect on accuracy of the calculated molar mass distribution and polymer solution properties. Elimination of concentration detector traces may significantly improve the quantitation of polymers with long high-molar-mass tails, e.g., caused by long-chain branches. Novel approaches to model fitting of calibration and structural curves describing the relations between polymers' structural parameters are discussed in detail. The characterization of an ethylene-methyl acrylate copolymer illustrates the quantitative approaches.
机译:介绍了近期三维探测器SEC数据减少改进的全面分析。在整个聚合物分布上使用样品的流体动力学体积的直接测量,可以分析不同尺寸排除分离的不同理想源,以及它们对计算的摩尔质量分布和聚合物溶液性能的精度的影响。消除浓度检测器迹线可以显着提高具有长高摩尔质量尾部的聚合物的定量,例如由长链分支引起的。详细讨论了描述了描述聚合物结构参数关系的校准和结构曲线模型拟合的新方法。乙烯 - 甲基丙烯酸酯共聚物的表征示出了定量方法。

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