Simultaneous determination of dopamine, uric acid, and tryptophan using an MWCNT modified carbon paste electrode by square wave voltammetry

Hadi BEITOLLAHI; Alireza MOHADESI; Saeedeh KHALILIZADEH MAHANI

Article Details

Simultaneous determination of dopamine, uric acid, and tryptophan using an MWCNT modified carbon paste electrode by square wave voltammetry

Authors:

Hadi BEITOLLAHI | Alireza MOHADESI | Saeedeh KHALILIZADEH MAHANI

Publisher:

TUBITAK

Main Topics:

Applied physics

Journal:

Turkish Journal of Chemistry 2012 Vol.36 Issue 4, pp.526-536

Document Type:

Article

Publication Date:

3/2012

Document Language:

English

Document ID (Org No.):

2000727577

Frequency:

Bimonthly

eISSN:

1303-6130

pISSN:

1300-0527

Abstract:

 

A highly sensitive method was investigated for the  simultaneous determination of dopamine (DA), uric acid (UA), and  tryptophan (TRP) using a multiwall carbon  nanotubes/5-amino-3',4'-dimethoxy-biphenyl-2-ol modified carbon paste  electrode (5ADMBCNPE).  The 5ADMBCNPE displayed excellent  electrochemical catalytic activities towards the oxidation of DA, UA,  and TRP. The electrochemical profile of the proposed modified  electrode was analyzed by cyclic voltammetry (CV), which showed a  shift in the oxidation peak potential of DA at 160 mV to a less  positive value compared with an unmodified carbon paste electrode.  Square wave voltammetry (SWV) in 0.1 M phosphate buffer solution (PBS)  at pH 7.0 was performed to determine DA in the range from 1.2 to 800.0  m M, with a detection limit of 0.16 m M. The present method was  applied to the determination of DA in some real samples.

 

A highly sensitive method was investigated for the  simultaneous determination of dopamine (DA), uric acid (UA), and  tryptophan (TRP) using a multiwall carbon  nanotubes/5-amino-3',4'-dimethoxy-biphenyl-2-ol modified carbon paste  electrode (5ADMBCNPE).  The 5ADMBCNPE displayed excellent  electrochemical catalytic activities towards the oxidation of DA, UA,  and TRP. The electrochemical profile of the proposed modified  electrode was analyzed by cyclic voltammetry (CV), which showed a  shift in the oxidation peak potential of DA at 160 mV to a less  positive value compared with an unmodified carbon paste electrode.  Square wave voltammetry (SWV) in 0.1 M phosphate buffer solution (PBS)  at pH 7.0 was performed to determine DA in the range from 1.2 to 800.0  m M, with a detection limit of 0.16 m M. The present method was  applied to the determination of DA in some real samples.

Article Details

Simultaneous determination of dopamine, uric acid, and tryptophan using an MWCNT modified carbon paste electrode by square wave voltammetry

Authors: Hadi BEITOLLAHI | Alireza MOHADESI | Saeedeh KHALILIZADEH MAHANI

Publisher: TUBITAK

Main Topics: Applied physics

Journal: Turkish Journal of Chemistry 2012 Vol.36 Issue 4, pp.526-536

Document Type: Article

Publication Date: 3/2012

Document Language: English

Document ID (Org No.): 2000727577

Frequency: Bimonthly

eISSN: 1303-6130

pISSN: 1300-0527

Issues

Authors:

Hadi BEITOLLAHI | Alireza MOHADESI | Saeedeh KHALILIZADEH MAHANI

Publisher:

TUBITAK

Main Topics:

Applied physics

Journal:

Turkish Journal of Chemistry 2012 Vol.36 Issue 4, pp.526-536

Document Type:

Article

Publication Date:

3/2012

Document Language:

English

Document ID (Org No.):

2000727577

Frequency:

Bimonthly

eISSN:

1303-6130

pISSN:

1300-0527