English  |  正體中文  |  简体中文  |  Items with full text/Total items : 17776/20117 (88%)
Visitors : 12130301      Online Users : 239
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version
    Please use this identifier to cite or link to this item: http://ir.cnu.edu.tw/handle/310902800/30433

    標題: 含硒與其衍生物之化妝品與藥品測定方法之研究
    Determination of Selenium and Its Derivatives in Cosmetic and Drug Products
    作者: 王來好
    貢獻者: 嘉藥學校財團法人嘉南藥理大學醫藥化學系
    關鍵字: 硫醇化合物修飾金電極
    Thiol-compounds modified gold electrodes
    日期: 2015
    上傳時間: 2017-11-22 10:38:16 (UTC+8)
    摘要: 本研究設計新電化學技術,製配5種硫醇(thiol)化合物薄膜 (2, 4-thiazolidinedione, 2-mercapto-5-thiazoline, 2-mercaptothiazoline, L-cysteine, thioglycolic acid),修飾金電極當工作電極。裝入流動式電解槽 (flow cell)中,當作檢測器並連線高效率液相層析儀,測定甲硒胺酸 (L-elenomethionine)和甲基硒代半胱胺酸 (Se-methylseleno-L-cysteine)之含量。二種有機硒的電化學氧化效果在硫醇(thiol)修飾金電極測定之靈敏度皆比
    未修飾金電極為高。利用DC模式,合適的實驗參數測定,線性濃度從10至1600 ng mL1。二種有機硒的偵測極限低於10 ng mL1。此方法可以適用於定量測定市售含有硒補充產品之甲硒胺酸和甲基硒代半胱胺酸。比較高效率液相層析法連線伏安檢測器和紫外線檢測之結果是一致。
    A flow-electrolytical cell containing a thio-compounds (2,
    4-thiazolidinedione, 2-mercapto-5-thiazoline, 2-
    mercaptothiazoline, L-cysteine, thioglycolic acid) modified
    gold electrodes has been designed and characterized for use
    in a voltammatric detector for detecting L-selenomethionine
    and Se-methylseleno-L-cysteine using high-performance
    liquid chromatography. Both L-selenomethionine and Semethylseleno-
    L-cysteine are more
    efficiently electrochemical oxidized on a thio/ Au than a
    bare gold electrode. For the DC mode, and measurements with
    suitable experimental parameters, a linear concentration
    from 10 to 1600 ng mL?1 was found. The limit of
    quantification for L-selenomethionine and Se-methylseleno-
    L-cysteine were below 10 ng mL?1. The method can be applied
    to the quantitatively determining L-selenomethionine and
    Se-methylseleno-L-cysteine in commercial containing
    selenium supplement products. Findings using highperformance
    liquid chromatography with a flow-through
    voltammetric detector and ultraviolet detector are
    關聯: 計畫編號:MOST104-2113-M041-001
    Appears in Collections:[醫藥化學系 ] 科技部計畫

    Files in This Item:

    File Description SizeFormat
    104-2113-M041-001.pdf732KbAdobe PDF179View/Open

    All items in CNU IR are protected by copyright, with all rights reserved.

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback