21032
GC Stationary Phase
phase Carbowax 20M, bottle of 50 g
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About This Item
Código UNSPSC:
23151817
Produtos recomendados
Agency
meets requirements for USP G16
forma
solid
embalagem
bottle of 50 g
Parâmetros
60-225 °C temp. range
técnica(s)
gas chromatography (GC): suitable
Grupo ativo da matriz
Carbowax 20M phase
solubilidade
chloroform: soluble
Constante de McReynolds
17, 86, 48, 69, 56
tipo de coluna
packed GC
Categorias relacionadas
Descrição geral
GC methods are divided into two classes depending on the nature of stationary phases; gas-solid chromatography (GSC) and gas-liquid chromatography (GLC). GSC has solid adsorptive material and solute particles are removed from mobile phase by electrostatic forces. GLC has a thin layer of liquid coated or bonded on the surface of an inert particle or on the walls of the column where solute particles are retained in the liquid phase based on their partition coefficients. The primary necessity of a stationary phase is to provide sample separation sustaining phase integrity over a reasonable period of time. It should be stable for the chemical and thermal changes. Selectivity, peak symmetry, analysis time, degree of separation, peak tailing are few parameters that should be considered before choosing a stationary phase. Carbowax 20M is a polar liquid phase suitable as stationary phase for gas chromatography. It consists of two units of (HC2-CH2O)600 with OH terminals connected through a hydrophobic portion. This structure of the polymer makes it suitable for being used as a solvent for polar molecules such as cyclodextrin derivatives. It exhibits good selectivity toward alcohols, diols and aromatic isomeric molecules.
Synthesized specifically to be purer, of narrow molecular weight range, and without trace catalysts or impurities for use as a GC stationary phase.
Aplicação
Carbowax 20M may be used to test different relative amounts of crosslinking reagents by coating the inner wall of the capillary, to optimizing the capillary column performance.
Código de classe de armazenamento
11 - Combustible Solids
Classe de risco de água (WGK)
WGK 3
Ponto de fulgor (°F)
Not applicable
Ponto de fulgor (°C)
Not applicable
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Jaiver Osorio Grisales et al.
Journal of chromatography. A, 1216(40), 6844-6851 (2009-09-01)
This paper reports the study of poly(oxyethylene) as a solvent for heptakis(2,3,6-tri-O-methyl)-beta-cyclodextrin (PM-beta-CD) and the potential of these mixtures for constructing enantioselective gas chromatography columns. Enantioseparations of volatile racemic mixtures using capillaries coated with 10-50% PM-beta-CD diluted in Carbowax 20M
George Charalambous
Chemistry of foods and beverages: Recent developments, 76-76 (1982)
Michael Gratzel
Energy Resour. Photochem. Catal. (M. Gratzel, ed.) (1983)
Nuno I P Valente et al.
Sensors (Basel, Switzerland), 18(8) (2018-07-26)
Cheese prepared from whole milk, raw and pasteurized, were analysed by an electronic nose based on piezoelectric quartz crystals and an electronic tongue based on potentiometric sensors, immediately after their preparation and along ripening (after 7 and 21 days). Whey
James P. Lodge, Jr.
Methods of Air Sampling and Analysis, 98-98 (1988)
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