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Polymerization of formic acid on porous glassy carbon surface

✍ Scribed by Tina M. Engel; Susan V. Olesik

Publisher
John Wiley and Sons
Year
1991
Tongue
English
Weight
621 KB
Volume
3
Category
Article
ISSN
1040-7685

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✦ Synopsis

Abstract

While using porous glassy carbon (PGC) as a stationary phase for supercritical fluid chromatography (SFC), irreversible modifications of the PGC surface were observed when using 3% formic acid in supercritical carbon dioxide mobile phase at mild operating conditions. Scanning electron microscopic and energy dispersive X‐ray spectroscopic analyses indicated the formation of a polymer coating on the PGC surface. The coating may be formed from a polymerization reaction of the formic acid modifier catalyzed by the presence of the carbon surface. Those using carbon‐based stationary phases should be aware of this reaction when using formic acid as a modifier for SFC.

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