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Supelco

GC Stationary Phase

phase Carbowax 20M, bottle of 50 g

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About This Item

UNSPSC Code:
23151817

agency

meets requirements for USP G16

Quality Level

form

solid

packaging

bottle of 50 g

parameter

60-225 °C temp. range

technique(s)

gas chromatography (GC): suitable

matrix active group

Carbowax 20M phase

solubility

chloroform: soluble

McReynolds constant

17, 86, 48, 69, 56

column type

packed GC

General description

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.

Application

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.

Storage Class

11 - Combustible Solids

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable


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Michael Gratzel
Energy Resour. Photochem. Catal. (M. Gratzel, ed.) (1983)
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)
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
David B. Troy, Paul Beringer
Remington: The Science and Practice of Pharmacy, 605-605 (2006)

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