Petsch M, Mayer-Helm BX, Söllner V. Preparation and characterization of fused-silica capillary columns coated with m-carborane–siloxane copolymers for gas chromatography.
Anal Bioanal Chem 2005;
383:322-6. [PMID:
16143857 DOI:
10.1007/s00216-005-3399-6]
[Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2005] [Revised: 06/09/2005] [Accepted: 06/15/2005] [Indexed: 11/25/2022]
Abstract
The carborane-siloxane copolymers Dexsil 300, a 34.5% bis(dimethylsilyl)-m-carborane-65.5% dimethylsiloxane copolymer, and Dexsil 400, a 24.9% bis(dimethylsilyl)-m-carborane-50.8% dimethyl, 24.3% methylphenylsiloxane copolymer, were coated on fused silica capillary columns and their gas chromatographic properties were evaluated. Their selectivity was evaluated using both Rohrschneider-McReynolds constants and triacylglycerol indices. The bis(dimethylsilyl)-m-carborane unit turned out to be equivalent to two dimethylsiloxy units and one half of a diphenylsiloxy unit. The m-carborane unit was found to cause a 15-25 K shift in the elution temperature between 120 and 360 degrees C. The working range was from 20 and 0 degrees C to 380 degrees C for Dexsil 300 and Dexsil 400, respectively. The column bleeding levels at 380 degrees C were below 20 and 15 pA for Dexsil 300 and Dexsil 400, respectively.
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