Title

Characterization of Modified Silica Gel as a Source of Ethene for Standard Gaseous Mixtures

Document Type

Article

Publication Date

4-21-1998

Publication Title

Microchemical Journal

Abstract

The application of chemically modified silica gel as a source of gaseous standard mixture containing ethene as a measured component is described. The surface of silica gel was chemically modified, which resulted in the formation of N-oxide of diethylaminopropylsilylated silica gel. This compound undergoes thermal decomposition at 245°C, yielding known amounts of ethene. The process of thermal decomposition of chemically modified silica gel took place in a desorber furnace connected on-line via a four-port valve to the device being calibrated. Such a solution provides convenient calibration of a GC/FID system after direct introduction of a stream of the generated mixture onto the front of a GC. It was found that 480 ± 15 mg of ethene can be generated per 1 g of the modified gel.

Volume

59

Issue

3

First Page

437

Last Page

447

DOI

https://doi.org/10.1006/mchj.1998.1631

ISSN

0026-265X

Rights

© 1998 Academic Press

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