Influence of the pH on Separating DNA by High-Speed Microchip Electrophoresis

Various factors are critical in resolving DNA molecules at high speed, including the separation medium, concentration, composition, and pH of the buffer, as well as the electric field strength. To this study, considered the composition of a buffer and the difference in the pH, while paying attention...

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Bibliographic Details
Published in:Analytical Sciences 2004, Vol.20(6), pp.971-974
Main Authors: OSAFUNE, Tomo, NAGATA, Hideya, BABA, Yoshinobu
Format: Article
Language:English
Subjects:
Deoxyribonucleic acid
DNA
DNA - isolation & purification
Electrophoresis
Electrophoresis, Capillary - methods
Hydrogen-Ion Concentration
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Summary:Various factors are critical in resolving DNA molecules at high speed, including the separation medium, concentration, composition, and pH of the buffer, as well as the electric field strength. To this study, considered the composition of a buffer and the difference in the pH, while paying attention to whether the separation ability changes in the microchip electrophoresis of DNA. DNA separation was particularly affected by both the buffer composition and the pH. Under the optimal microchip electrophoresis conditions that were determined in this study, an improved resolution of a wider range of DNA fragment sizes was achieved. Moreover, the total separation time decreased from 240 s to 100 s. Thus, by simplifying and improving the DNA electrophoresis in the microchip, this technique is now widely applicable to several different scientific fields.
ISSN:0910-6340
1348-2246
DOI:10.2116/analsci.20.971