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Silicalite as a stationary phase for HPLC

✍ Scribed by Dumont, Philip J. ;Fritz, James S.

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
382 KB
Volume
19
Category
Article
ISSN
0935-6304

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✦ Synopsis

Abstract

A molecular sieve known as Silicalite was used as the column packing for HPLC. Silicalite contains channels (or cavities) approximately 6 Å in diameter but, unlike most other molecular sieves, Silicalite is hydrophobic. The retention times of methyl ketones and substituted phenols containing n‐alkyl groups increase with increasing chain length of the substituent. However, phenols with very bulky substituents appear to be excluded from the Silicalite channels and elute very quickly. Excellent separations were obtained for a number of compounds with only slight differences in chemical structure. These include phenol isomers with a primary‐ or secondary alkyl group, position isomers of substituted phenols, and aliphatic cis‐trans isomers.

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