Electrochemical behavior and detection of guanine using a sodium montmorillonite-modified carbon paste electrode

被引:13
|
作者
Huang, W [1 ]
Zhang, S [1 ]
Wu, Y [1 ]
机构
[1] Hubei Inst Nationalities, Hubei 445000, Peoples R China
关键词
sodium montmorillonitc; guanine; modified carbon paste electrode; electrochemical determination;
D O I
10.1134/S1023193506020078
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Herein, a sodium montmorillonite-modified carbon paste electrode is described for the electrochemical determination of guanine. Guanine yields a well-defined and very sensitive oxidation peak at the sodium montmorillonite-modified carbon paste electrode. Compared with the unmodified carbon paste electrode, the modified electrode facilitates the electron transfer of guanine, since it notably increases the oxidation peak current and lowers the oxidation overpotential of guanine. Based on this, a simple sensitive reliable electrochemical method is proposed for the detection of guanine after all the experimental parameters, such as solution pH value, sodium montmorillonite content in the carbon paste electrode, accumulation potential, and time, are optimized. Under the optimized conditions, the oxidation peak current of guanine varies linearly with its concentration in the range 5.0 x 10(-8) to 2.0 x 10(-5) M and the detection limit (signal-to-noise = 3) is 2.0 x 10(-8) M after 4-min accumulation. This method is successfully demonstrated with urine samples.
引用
收藏
页码:153 / 156
页数:4
相关论文
共 50 条
  • [11] Electrochemical determination of lead(II) using a montmorillonite calcium-modified carbon paste electrode
    Dong Sun
    Chidan Wan
    Gang Li
    Kangbing Wu
    Microchimica Acta, 2007, 158 : 255 - 260
  • [12] Electrochemical determination of lead(II) using a montmorillonite calcium-modified carbon paste electrode
    Sun, Dong
    Wan, Chidan
    Li, Gang
    Wu, Kangbing
    MICROCHIMICA ACTA, 2007, 158 (3-4) : 255 - 260
  • [13] Electrochemical behavior of nicotinamide using carbon paste electrode modified with macrocyclic compounds
    Rahul M. Kotkar
    Ashwini K. Srivastava
    Journal of Inclusion Phenomena and Macrocyclic Chemistry, 2008, 60 : 271 - 279
  • [14] Electrochemical behavior of nicotinamide using carbon paste electrode modified with macrocyclic compounds
    Kotkar, Rahul M.
    Srivastava, Ashwini K.
    JOURNAL OF INCLUSION PHENOMENA AND MACROCYCLIC CHEMISTRY, 2008, 60 (3-4) : 271 - 279
  • [15] Preparation of montmorillonite-modified carbon foams
    Wang, Qian
    Li, He-Jun
    Zhang, Yu-Lei
    Li, Ke-Zhi
    Wang, Bin
    Xinxing Tan Cailiao/New Carbon Materials, 2014, 29 (02): : 143 - 148
  • [16] Electrochemical Studies of Sodium Levothyroxine at Surfactant Modified Carbon Paste Electrode
    Chitravathi, S.
    Kumaraswamy, B. E.
    Niranjana, E.
    Chandra, Umesh
    Mamatha, G. P.
    Sherigara, B. S.
    INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE, 2009, 4 (02): : 223 - 237
  • [17] A new copper doped montmorillonite modified carbon paste electrode for propineb detection
    Abbaci, A.
    Azzouz, N.
    Bouznit, Y.
    APPLIED CLAY SCIENCE, 2014, 90 : 130 - 134
  • [18] Electrochemical detection of carbidopa using a ferrocene-modified carbon nanotube paste electrode
    Yaghoubian, Halimeh
    Karimi-Maleh, Hassan
    Khalilzadeh, Mohammad Ali
    Karimi, Fatemeh
    JOURNAL OF THE SERBIAN CHEMICAL SOCIETY, 2009, 74 (12) : 1443 - 1453
  • [19] Electrochemical Detection of Metronidazole Using Silver Nanoparticle-Modified Carbon Paste Electrode
    Jallal Zoubir
    Nadia Bougdour
    Widad El Hayaoui
    Chaimae Radaa
    Abderrahim Idlahcen
    Ali Assabbane
    Idriss Bakas
    Electrocatalysis, 2022, 13 : 386 - 401
  • [20] Electrochemical Detection of Metronidazole Using Silver Nanoparticle-Modified Carbon Paste Electrode
    Zoubir, Jallal
    Bougdour, Nadia
    El Hayaoui, Widad
    Radaa, Chaimae
    Idlahcen, Abderrahim
    Assabbane, Ali
    Bakas, Idriss
    ELECTROCATALYSIS, 2022, 13 (04) : 386 - 401