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    Please use this identifier to cite or link to this item: https://ir.fy.edu.tw:8080/ir/handle/987654321/3250

    Title: Mazimization of injection volumes for DNA analysis in capillary electrophoresis
    Authors: Huang,Chih-Ching;Hsieh, Ming-Mu;Chiu, Tai-Chia;Lin,Yu-Cheng;Chang,Huan-Tsung
    Contributors: 輔英科技大學 應用化學及材料科學系
    Keywords: Capillary electrophoresis;DNA;Laser-induced fluorescence;Polymer solution;Concentration;Polymerase chain reaction
    Date: 2001-12
    Issue Date: 2010-09-28 16:53:40 (UTC+8)
    Abstract: We report concentration and separation of DNA in the presence of electroosmotic flow (EOF) using poly(ethylene oxide) (PEO) solution. DNA fragments migrating against EOF stacked between the sample zone and PEO solution. To maximize the injection volume, several factors, such as concentrations of Tris-borate (TB) buffer and PEO solution, capillary size, and matrix, were carefully evaluated. The use of 25 mM TB buffers, pH 10.0, containing suitable amounts (less than 10 mM) of salts, such as sodium chloride, sodium phosphate, and sodium acetate, to prepare DNA is essential for the concentration of large-volume samples. In the presence of salts, the peaks also became sharper and the fluorescence intensity of DNA complexes increased. Using 2.5% PEO and a 150 νm capillary filled with 400 mM TB buffer, pH 10.0, up to 5 νL DNA samples (ϕX 174 RF DNA-HaeIII digest or the mixture of pBR 322/HaeIII, pBR 328/BglI, and pBR 328/HinfI digests) have been analyzed, resulting in more than 400-fold improvements in the sensitivity compared to that by conventional injections (ca. 36 nL). Moreover, this method allows the analysis of 3.5 νL PCR products amplified after 17 cycles without any sample pretreatment.
    Relation: ELECTROPHORESIS,Volume 22, Issue 20, pages 4328–4332
    Appears in Collections:[應用化學及材料科學系] 期刊論文

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