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Scanning electrochemical detection in capillary electrophoresis

✍ Scribed by Sandra S. Ferris; Guoan Lou; Andrew G. Ewing

Publisher
John Wiley and Sons
Year
1994
Tongue
English
Weight
512 KB
Volume
6
Category
Article
ISSN
1040-7685

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✦ Synopsis

Abstract

Scanning electrochemical detection has been combined with capillary electrophoresis to increase the resolving power for closely eluting solutes. This detection mode has been characterized and provides voltammetric information for easily oxidized solutes with linear detection over concentrations in the 10^βˆ’3^ to 10^βˆ’5^ M range. Detection limits for catechols range from 360 amol to 740 amol (2.3 ΞΌM to 6.6 ΞΌM concentrations). Finally, two neutral solutes, catechol and tryptophan, co‐elute under zone electrophoresis conditions, but are resolved with scanning detection.

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