Size exclusion chromatography (SEC) is a technique routinely used at high temperature to analyze the molar mass distribution (MMD) in polymers. The of comonomer along axis copolymer key microstructural feature that determines macroscopic properties material and thus its range possible applications. However, unsaturated polymers requiring dissolution temperature, measurement chemical composition...

Ziegler-Natta (ZN) based co-polymerization processes for the production of linear low-density polyethylene (LLDPE) generally give rise to a non-uniform incorporation distribution comonomer. It has been shown that lowering titanation temperature during catalyst synthesis can increase evenness this distribution. However, polymerization process parameters also affect resulting To investigate these...

This work presents a multi-analytical approach for the characterization of marine dissolved organic matter (DOM). The determination carbon (DOC) was performed by size exclusion chromatography (SEC) and validated using certified reference material (CRM) as well through an intercomparison exercise. Multi-detection SEC, fluorescence electrochemical methods were used in order to describe distributi...

Biological small-angle X-ray scattering (BioSAXS) is a powerful technique to determine the solution structure, particle size, shape and surface-to-volume ratio of macromolecules. However, a drawback is that the sample needs to be monodisperse. To ensure this, size-exclusion chromatography (SEC) has been implemented on many BioSAXS beamlines. Here, the integration of ion-exchange chromatography ...

The aim of this work is the development a suitable method to extract and detect zinc-bound compounds from cabbage, broccoli kale (family Brassicaceae, species oleracea) using solid phase extraction (SPE) size-exclusion chromatography inductively coupled plasma mass spectrometry (SEC-ICP-MS). Tris [2-Amino-2-(hydroxymethyl)-1,3-propanediol]/hydrochloric acid (Tris/HCl) or ammonium nitrate were u...

The similarity between a proposed biosimilar product and the reference product can be affected by many factors. This study is designed to examine whether any subtle difference in the distribution of the charge variants of an Avastin biosimilar can affect its in vitro potency and in vivo PK. Here, the acidic, basic and main peak fractions of a biosimilar product were isolated using high-performa...

An exopolysaccharide-producing Gram negative bacterium was isolated and determined to be a Sphingomonas sp. (CS101). A sugar composition analysis of an exopolysaccharide indicated that the Sphingomonas sp. CS101 secreted an exopolysaccharide composed of glucose, mannose, fucose, and rhamnose in the ratio of 2.1:1.1:1.0:0.1, suggesting that this exoplysaccharide is an unusual type of sphingan fa...

Abstract The molar masses and mass distributions of three commercial regenerated cellulose samples, viscose rayon, Tencel, Bemliese (or cuprammonium nonwoven), have been determined by dissolution in 8% (w/w) lithium chloride/ N , -dimethylacetamide (LiCl/DMAc) subsequent size-exclusion chromatography with multi-angle laser-light scattering detection (SEC/MALLS). Before LiCl/DMAc, the samples we...