Abstract
A new approach to construct an ampermetric biosensor was described.The 4,4-bis(methanethiol)biphenyl(MTP)is adsorbed on to a bare gold electrode to make self-assembled monolayers(MTP/Au SAMs).Then electrodeposited 2mg/mL HAuCl4 at-200 mV,NG/MTP/Au electrode was prepared.When a differential pulse voltammetric(DPV)technique was used,the peak separation between DA and AA is 155 mV.Hence,the selective determination of dopamine(DA)and ascorbate(AA)in the binary mixture system can be performed.Under the chosen conditions,the peak currents are correspondent linearly to the concentrations of DA and AA in the range of 5.0×10-7~1×10-4 mol·L-1 and 3.5×10-6~1.0×10-3mol·L-1,respectively.The correlation coefficients were 0.998.The detection limit were 1.5×10-7 mol·L-1 and 1.2×10-6 mol·L-1for DA and AA.
Keywords
dopamine, ascorbate, gold nanpoarticle, MTP, DPV
Publication Date
2007-05-28
Online Available Date
2007-05-28
Revised Date
2007-05-28
Received Date
2007-05-28
Recommended Citation
Hai-yan WANG, Peng LIU, Ye WANG, Bao-kang JIN.
Determination of Ddopamine and Ascorbate on Gold Nanoparticle and 4,4-bis (methanethiol) biphenyl (MTP) Self-assembled Monolayer Modified Gold Electrode[J]. Journal of Electrochemistry,
2007
,
13(2): 127-131.
DOI: 10.61558/2993-074X.1793
Available at:
https://jelectrochem.xmu.edu.cn/journal/vol13/iss2/3
Included in
Engineering Science and Materials Commons, Materials Chemistry Commons, Materials Science and Engineering Commons, Nanoscience and Nanotechnology Commons, Physical Chemistry Commons
