Separation and Determination of Fluorescein Isothiocyanate-Labeled Amino Acids by Capillary Electrophoresis with Laser-Induced Fluorescence Detection

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A method for the separation and determination of amino acids by capillary electrophoresis with laser-induced fluores-cence detection has been developed. At first, the condition for the derivatization of amino acids with fluorescein isothio-cyanate (FITC) was studied; it was proved to be optimal at 50°C for 5 h. Next, the separation of 20 FITC-amino acids was attempted by using an unmodified fused silica capillary. Actually, 18 kinds of FITC-amino acids were separated with 96 mM sodium borate buffer (pH 9.5) containing either 25% acetone (separation system 1) or 10% methanol (separation system 2). The resolution of 19 FITC-amino acids was attained with 80 mM sodium borate buffer (pH 9.2) containing 45 mM α-cyclodextrin (separation system 3). Finally, we succeeded in separating 20 FITC-amino acids by combining two migration systems (2 and 3). The FITC-amino acids were detected by argon-ion laser-induced fluorescence (Ex 488 nm, Em 520 nm). The detection limits of the amino acids obtained with separation systems 1 and 2 were 0.052-1.01 fmol.

収録刊行物

  • Analytical sciences : the international journal of the Japan Society for Analytical Chemistry

    Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 14(5), 925-928, 1998-10-10

    社団法人 日本分析化学会

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各種コード

  • NII論文ID(NAID)
    10002417248
  • NII書誌ID(NCID)
    AA10500785
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    09106340
  • NDL 記事登録ID
    4576989
  • NDL 雑誌分類
    ZP4(科学技術--化学・化学工業--分析化学)
  • NDL 請求記号
    Z54-F482
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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