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Preparation and evaluation of an on-line preconcentrator for capillary electrophoresis

✍ Scribed by Arthur M. Hoyt Jr; Stephen C. Beale; John P. Larmann Jr; James W. Jorgenson

Publisher
John Wiley and Sons
Year
1993
Tongue
English
Weight
481 KB
Volume
5
Category
Article
ISSN
1040-7685

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✦ Synopsis

Abstract

The preparation and performance of an on‐line preconcentrator for capillary electrophoresis (CE) is described. Borosilicate glass microspheres were dry‐packed into the fused silica column terminus and sintered in place with a micro electric are developed for this application. Reversed‐phase LC packing material was slurry‐packed onto this frit, in lengths of 1‐3 mm. An additional frit of borosilicate beads behind the preconcentrator was used to fix the packed bed in place. The performance of the packed bed preconcentrator for the enhancement of UV and fluorescence detection limits was evaluated. Construction of the micro electric are device, the packing procedures, and practical applications are described.

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