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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Utilization of a conventional CRT monitor as a high voltage power supply for capillary electrophoresis

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Author(s):
José Alberto Fracassi da Silva [1] ; Leonardo Frasatto [2]
Total Authors: 2
Affiliation:
[1] Universidade Estadual de Campinas. Instituto de Química. Departamento de Química Analítica - Brasil
[2] Universidade Estadual de Campinas. Instituto de Química. Departamento de Química Analítica - Brasil
Total Affiliations: 2
Document type: Journal article
Source: Química Nova; v. 29, n. 6, p. 1377-1380, 2006-12-00.
Abstract

This article describes the use of a conventional CRT monitor as a high voltage power supply for capillary electrophoresis. With this monitor, a 23-kV high voltage with a ripple of 1.32% was observed. The reproducibility of the applied high voltage was evaluated by measuring the standard deviations of peak area and migration time for five consecutive injections of a test mixture containing potassium, sodium, and lithium cations at 50 mmol L-1. The errors were about 2.5% and 0.6% for peak area and migration time, respectively. The maximum current tested was about 180 mA, which covers most capillary electrophoresis applications. This system has been successfully used for several months, maintaining the desired level of performance. (AU)