The B-Dex 225 is nonbonded, therefore it does not support aqueous injections. Injecting water can wash the phase out of the column. It's essential for both the samples and the carrier gas to be moisture free. This applies to all non-bonded phase columns, not just chiral columns.
24348
β-DEX™ 225
L × I.D. 30 m × 0.25 mm, df 0.25 μm
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About This Item
Codice UNSPSC:
41115710
eCl@ss:
32119290
Prezzi e disponibilità al momento non sono disponibili
Prodotti consigliati
Materiali
fused silica
Livello qualitativo
Descrizione
GC capillary column
Parametri
30-230 °C temperature
Beta
250
df
0.25 μm
tecniche
gas chromatography (GC): suitable
Lungh. × D.I.
30 m × 0.25 mm
Gruppo funzionale matrice
non-bonded; 25% 2,3-di-O-acetyl-6-O-TBDMS-β-cyclodextrin in SPB-20 poly(20% phenyl/80% dimethylsiloxane) phase
applicazioni
agriculture
chemicals and industrial polymers
cleaning products
clinical
cosmetics
environmental
flavors and fragrances
food and beverages
forensics and toxicology
life science and biopharma
personal care
pharmaceutical (small molecule)
Tipo di colonna
capillary chiral
Tecnica di separazione
chiral
Descrizione generale
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.[1]
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.
Resistenza chim/fis
Temp. Limits:
- 30 °C to 230 °C
Altre note
We offer a variety of chromatography accessories including analytical syringes
Note legali
DEX is a trademark of Sigma-Aldrich Co. LLC
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I clienti hanno visto anche
Scott RPW.
Introduction to Analytical Gas Chromatography, 101-102 (1997)
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After reading the care document and noting that the CHIRALDEX TA columns should not be exposed to moisture in the sample, is it acceptable to inject aqueous samples into the beta DEX 225 column?
1 answer-
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