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24348

Supelco

β-DEX 225

L × I.D. 30 m × 0.25 mm, df 0.25 μm

eCl@ss:
32119290
Pricing and availability is not currently available.

Quality Level

material

fused silica

description

GC capillary column

parameter

30-230 °C temperature

Beta value

250

df

0.25 μm

application(s)

gas chromatography (GC): suitable

L × I.D.

30 m × 0.25 mm

matrix active group

non-bonded; 25% 2,3-di-O-acetyl-6-O-TBDMS-β-cyclodextrin in SPB-20 poly(20% phenyl/80% dimethylsiloxane) phase

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Pharmaceutical (small molecule)

column type

capillary chiral

separation technique

chiral

General description

Capillary GC column is also known as open tubular column. The carrier gas flows through the central aperture and is unrestricted throughout the length of the column.
The Supelco β-DEX 225 is a modified form of the β-DEX 325 phase, and employs acetyl derivatives at the 2,3-positions instead of more traditional methyl derivatives. The chiral stationary phase in β-DEX 225 columns contains 2,3-di-O-acetyl-6-0-TBDMS-β-cyclodextrin embedded in an intermediate polarity phase. These columns provide unique selectivity for enantiomeric separations of small molecules: alcohols, aldehydes (e.g., 2-phenylpropionaldehyde), esters (e.g. methyl malate, methyl lactate), flavor compounds and ketones.

Chem/Phys Resistance

Temp. Limits:
  • 30 °C to 230 °C

Legal Information

DEX is a trademark of Sigma-Aldrich Co. LLC
Scott RPW.
Introduction to Analytical Gas Chromatography, 101-102 (1997)

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