Document Detail

Preparation of novel mercury-doped silver nanoparticles film glassy carbon electrode and its application for electrochemical biosensor.
MedLine Citation:
PMID:  15866527     Owner:  NLM     Status:  MEDLINE    
A novel mercury-doped silver nanoparticles film glassy carbon (Ag/MFGC) electrode was prepared in this study. Electrochemical behaviors of cysteine on the Ag/MFGC electrode were investigated by electrochemical impedance spectroscopy and cyclic voltammetry (CV). The results indicated that cysteine could be strongly adsorbed on the surface of the Ag/MFGC electrode to form a thin layer. The doped electrode could catalyze the electrode reaction process of cysteine, and the cysteine displayed a pair of well-defined and nearly reversible CV peaks at the electrode in an acetate buffer solution (pH 5.0). The Ag/MFGC electrode was used for determination of cysteine by differential pulse voltammetry. The linear range was between 4.0x10(-7) and 1.3x10(-5) mol/L, with a detection limit of 1.0x10(-7) mol/L and a signal-to-noise ratio of 3. The relative standard deviation was 2.4% for seven successive determinations of 1.0x10(-5) mol/L cysteine. The determinations of cysteine in synthetic samples and urinal samples were carried out and satisfactory results were obtained. Amperometric application of the Ag/MFGC electrode as biosensors is proposed.
Mao-Guo Li; Yong-Jia Shang; Ying-Chun Gao; Guang-Feng Wang; Bin Fang
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Analytical biochemistry     Volume:  341     ISSN:  0003-2697     ISO Abbreviation:  Anal. Biochem.     Publication Date:  2005 Jun 
Date Detail:
Created Date:  2005-05-03     Completed Date:  2006-07-14     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0370535     Medline TA:  Anal Biochem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  52-7     Citation Subset:  IM    
School of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, People's Republic of China.
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MeSH Terms
Biosensing Techniques* / instrumentation,  methods
Cysteine / chemistry
Electrochemistry / instrumentation,  methods
Reg. No./Substance:
52-90-4/Cysteine; 7439-97-6/Mercury; 7440-22-4/Silver; 7440-44-0/Carbon

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