Size-exclusion chromatography of cellulose: observations on the low-molar-mass fraction
نویسندگان
چکیده
منابع مشابه
Size Exclusion Chromatography of Cellulose and Cellulose Derivatives
Approximately 2 X 10 ton biomass is produced on land and in water annually (l). Cellulose is the principal structural material in the cell wall of all plants (2). In addition, cellulose can be found in algae, bacteria, and animals (tunicates). Assuming that the average source contains 50% cellulose (Table 1) (35), then approximately 1 X 10 ton cellulose is formed each year. This makes cellulose...
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The retention behaviour of reference proteins on commercial siliceous size-exclusion supports was studied. Sorption was observed on both surface modified and unmodified supports. When sodium dodecylsulfate was added to the aqueous mobile phase, normal elution patterns were found. With this system, proteins, such as those isolated from different alfalfa genotypes, may be compared rapidly. Compar...
متن کاملSize Exclusion Chromatography of Polymers
In the characterization of polymers, size-exclusion chromatography (SEC) has become a standard technique for determining molar mass averages andmolar mass distributions (MMD) of polymers. The principle of SEC is easily understood: owing to limited accessability of the pore volume within the particles of the column packing, polymer molecules are separated according to their hydrodynamic volumes,...
متن کاملCharacterization of Non-Derivatized Cellulose Samples by Size Exclusion Chromatography in Tetrabutylammonium Fluoride/Dimethylsulfoxide (TBAF/DMSO).
This paper deals with the use of tetrabutylammonium fluoride/dimethylsulfoxide (TBAF/DMSO) to characterize the molar mass distribution of non-derivatized cellulosic samples by size exclusion chromatography (SEC). Different cellulose samples with various average degree of polymerization (DP) were first solubilized in this solvent system, with increasing TBAF rates, and then analyzed by SEC coupl...
متن کاملMolecular mass ranges of coal tar pitch fractions by mass spectrometry and size-exclusion chromatography.
A coal tar pitch was fractionated by solvent solubility into heptane-solubles, heptane-insoluble/toluene-solubles (asphaltenes), and toluene-insolubles (preasphaltenes). The aim of the work was to compare the mass ranges of the different fractions by several different techniques. Thermogravimetric analysis, size-exclusion chromatography (SEC) and UV-fluorescence spectroscopy showed distinct dif...
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ژورنال
عنوان ژورنال: Cellulose
سال: 2020
ISSN: 0969-0239,1572-882X
DOI: 10.1007/s10570-020-03419-9