Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Molar mass changes chromatography

Molar Mass Changes during Degradation Analysed by Size Exclusion Chromatography and/or Matrix Assisted Laser Desorption Ionisation... [Pg.129]

If two columns with different porosity are used in a column combination, the efficiency of the separation will not change much, but the fractionation range will be increased immensely. In this case, longer chromatography times allow a better separation of broader samples (or samples with high and low molar mass components). [Pg.275]

Changes in molar mass of irradiated polymers were measured by viscosity, gel permeation chromatography, osmometry and light scattering. G (scission) and G (cross-link) values can be derived from gel contents if cross-linking predominates (3) and a GPC technique requiring only 50 mg of polymer, which could be in the form of powder, was developed for this purpose (4). [Pg.128]

Nomenclature and terminology in polymer science, as in all areas of science, change with time. For example gel permeation chromatography is now more correctly referred to as size exclusion chromatography and molecular weight has become molar mass . However, the old terms are still used and it has been left to the indivudual authors to decide on appropriate terminology. [Pg.367]

In contrast to this, in (reactive) chromatography usually mass or molar concentrations are used. Then, j and r are the corresponding rates of change of these quantities, and a and / are the ratios of the volumetric hold-ups and the volumetric flow rates in both phases. N is equal to Ns, the number of solutes. For the details, we refer to Ref. [11]. [Pg.155]


See other pages where Molar mass changes chromatography is mentioned: [Pg.102]    [Pg.128]    [Pg.274]    [Pg.268]    [Pg.269]    [Pg.480]    [Pg.482]    [Pg.492]    [Pg.35]    [Pg.199]    [Pg.234]    [Pg.238]    [Pg.1223]    [Pg.234]    [Pg.407]    [Pg.18]    [Pg.10]    [Pg.16]    [Pg.905]    [Pg.225]    [Pg.273]    [Pg.313]    [Pg.42]    [Pg.37]    [Pg.227]    [Pg.1195]    [Pg.8282]    [Pg.285]    [Pg.284]    [Pg.1151]    [Pg.101]    [Pg.1038]    [Pg.105]    [Pg.311]    [Pg.56]    [Pg.66]    [Pg.631]    [Pg.179]    [Pg.119]    [Pg.36]    [Pg.36]    [Pg.377]    [Pg.51]    [Pg.155]    [Pg.316]    [Pg.66]   


SEARCH



Mass change

Molar mass

Molarity molar masses

© 2024 chempedia.info