Polymer Standards Service - Characterization of Natural and Synthetic Macromolecules White Papers

GPC Streamliner - Autumn Edition In this PSS Newsletter with the title: Compliance for polymers? You bet! you can find the following articles:
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Tips & Tricks - GPC/SEC: U-GPC? Making GPC/SEC Faster Ultra-HPLC (UHPLC) provides a new potential for method development and analysis. But can this approach be easily transferred to speed up GPC/SEC?
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Tips & Tricks - GPC/SEC: How to Validate a GPC/SEC System Validation is not an easy task. It is an ongoing complex process that evaluates the entire samle specific process, products and analytical methods, and consists of several qualification phases.
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Tips & Tricks - GPC/SEC: Copolymer Analysis in GPC/SEC 3 - CompositionaL Analysis by GPC/SEC with Multiple Detection GPC/SEC analysis reveals a multitude of molar mass information about unknown samples that are chemically simple or homogenous. However, results for copolymers may be compromised by the fact that fractions with different composition and different molar mass may be co-elute.
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Tips & Tricks - GPC/SEC: Copolymer Analysis in GPC/SEC 3 - Polymer Liquid Adsorption Chromatography Copolymer analysis is challenging due to the effect that two distributors can be present simultaneously, the molar mass distribution (MMD) and the chemical composition distribution (CCD).
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Tips & Tricks - GPC/SEC: Copolymer Analysis in GPC/SEC 3 - Two-Dimensional Chromatography Copolymer analysis is challenging due to the effect that at least two distributors can be present simultaneously: the molar mass distribution (MMD) and the chemical composition distribution (CCD). A problem in GPC/SEC that cannot be solved by using any detection technique is that the method may suffer from limited chromatographic resolution.
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Tips & Tricks - GPC/SEC: Peak Identification in GPC/SEC Analysing a complex mixture of unknown macromolecules and low molar mass compounds is often challenging in GPC/SEC. A disadvantage of the most commonly used detector, the very universal but unspecific refractive index (RI) detector, is that this detector only provides concentration information and no information about the chemistry. In addition, various positive and negative peaks besides the pure sample peaks in a GPC/SEC are normal.
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Tips & Tricks - GPC/SEC: Increase Resolution and Separation Range GPC/SEC is used to separate, indentify and characterize macromodules with respect to their molar mass averages and molar mass distribution (MMD). The precision and accuracy of the results depends, among other parameters, on the selection of the proper separation columns.
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Tips & Tricks - GPC/SEC: Absolute or True Molar MAsses for MAcromolecules - Mass Spectrometry as a New Solution GPC/SEC separates mocromolecules based on their hydrodynamic volume and, therefore, allows an ensemble of chains with different lengths to be seperated into small fractions. Promary information from GPC/SEC is the signal intensity at a defined elution volume. Molar mass distribution information can be obtained by assigning a molar mass to the elution volume.
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