Preparation, evaluation, and comparison of wide bore (320 μm) and narrow bore (50 μm) cyanosilicone-coated capillary columns for gas chromatography

✍ Scribed by Aerts, A. ;Rijks, J. ;Bemgard, A. ;Blomberg, L.

• Publisher: John Wiley and Sons
• Year: 1986
• Tongue: English
• Weight: 627 KB
• Volume: 9
• Category: Article
• ISSN: 0935-6304
• DOI: 10.1002/jhrc.1240090109

✦ Synopsis

The preparation of wide bore (320 pm) and narrow bore (50 pm) fused silica capillary columns is described for immobilized cyanopropyl substituted silicones containing 60 and 88% substitution. The effect of high temperature deactivation with cyanopropylcyclosiloxanes was studied with a special test mixture. Curing was achieved with dicumyl peroxide or azo-tenbutane.

The columns were evaluated and compared in terms of efficiency, activity, polarity, and temperature stability. Different coating methods were compared for the narrow bore columns. The activity of the 60% cyanopropyl columns that had been immobilized with dicumyl peroxide was significantly larger than for azo-ten-butane immobilized columns. The polarity of polar columns appeared to depend greatly on column temperature and is completely different for wide and narrow bore columns.