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  Journal of Nanoscience Letters 2012, 2: 25
  Research Article Open Access Article
 
Simultaneous detection of ascorbic acid and uric acid at MWCNT modified electrodes
  Nikos G. Tsierkezos, Uwe Ritter  
     
Department of Chemistry, Ilmenau University of Technology, Weimarer Straße 25, 98693 Ilmenau, Germany
   
  Abstract  
  Films based on multi-walled carbon nanotubes (MWCNT) were produced and their response towards simultaneous oxidation of ascorbic acid (AA) and uric acid (UA) was tested. MWCNT exhibit high sensitivity and fast response towards oxidation of AA and UA. Namely, MWCNT decrease the over-potential of AA, resolve the overlapping oxidation peaks of AA and UA into two well-defined peaks, and permit the simultaneous analytical detection of UA and AA. The detection limit of MWCNT towards AA and UA was 0.97 µmol•l-1 and 0.54 µmol•l-1, respectively.
     
  Keywords  
  Ascorbic acid; Electrochemical biosensors; Chemical vapor deposition; Multi-walled carbon nanotubes; Uric acid  
     
   
   
   
   
     

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