English  |  正體中文  |  简体中文  |  全文筆數/總筆數 : 51776/87004 (60%)
造訪人次 : 8382825      線上人數 : 46
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
搜尋範圍 查詢小技巧:
  • 您可在西文檢索詞彙前後加上"雙引號",以獲取較精準的檢索結果
  • 若欲以作者姓名搜尋,建議至進階搜尋限定作者欄位,可獲得較完整資料
  • 進階搜尋
    請使用永久網址來引用或連結此文件: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/97767


    題名: Low-potential amperometric determination of purine derivatives through surface oxide regeneration method
    作者: Chen, Chi-Hao;Lin, Ya-Ting;Lin, Meng-Shan
    貢獻者: 淡江大學化學學系
    關鍵詞: Uric acid;Xanthine;Hypoxanthine;Guanine;Adenine;Amperometry
    日期: 2013-09-24
    上傳時間: 2014-04-21 09:58:09 (UTC+8)
    出版者: Amsterdam: Elsevier BV
    摘要: This article described a novel amperometry which can be used for determination of purine derivatives including uric acid, xanthine, hypoxanthine, guanine, and adenine without surface contamination. By applying a constant potential of −0.125 V (vs.Ag/AgCl) in a flow injection system, the chelating capability of these purine derivatives converts the cuprous oxide layer into a soluble complex. This behavior would dissolve the passive oxide layer and expose the bottom copper layer to the solution, subsequently; an oxidation current which attributed to the regeneration of the original cuprous oxide layer is used to reflect the concentration of these purine derivatives. In a 50 mM phosphate buffer, pH 7.0, this approach provides a high sensitivity with LOQ of sub-micro molar level of five purines and high stability with a RSD of 2.5% for 10 μM xanthine (N = 12). This method does not suffer from most biological species including ascorbic acid, acetaminophen, creatine, dopamine, sarcosine, ammonium ion, chloride ion, and urea at equal or higher than its physiological concentration.
    關聯: Analytica Chimica Acta 796, pp.42–47
    DOI: 10.1016/j.aca.2013.08.011
    顯示於類別:[化學學系暨研究所] 期刊論文

    文件中的檔案:

    檔案 描述 大小格式瀏覽次數
    1-s2.0-S0003267013010751-main.pdf期刊論文檔1209KbAdobe PDF160檢視/開啟
    index.html0KbHTML232檢視/開啟

    在機構典藏中所有的資料項目都受到原著作權保護.

    TAIR相關文章

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - 回饋