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

Makale detayları

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

Yazarlar:

Hadi BEITOLLAHI | Alireza MOHADESI | Saeedeh KHALILIZADEH MAHANI

Yayıncı:

TUBITAK

Ana Başlıklar:

Uygulamalı fizik

Dergi:

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

Belge Tipi:

Makale

Yayın Tarihi:

3/2012

Belge Dili:

İngilizce

Document ID (Org No.):

2000727577

Sıklık:

İki Aylık

eISSN:

1303-6130

pISSN:

1300-0527

Özet:

 

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.

Makale detayları

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

Yazarlar: Hadi BEITOLLAHI | Alireza MOHADESI | Saeedeh KHALILIZADEH MAHANI

Yayıncı: TUBITAK

Ana Başlıklar: Uygulamalı fizik

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

Belge Tipi: Makale

Yayın Tarihi: 3/2012

Belge Dili: İngilizce

Document ID (Org No.): 2000727577

Sıklık: İki Aylık

eISSN: 1303-6130

pISSN: 1300-0527

Sayı

Yazarlar:

Hadi BEITOLLAHI | Alireza MOHADESI | Saeedeh KHALILIZADEH MAHANI

Yayıncı:

TUBITAK

Ana Başlıklar:

Uygulamalı fizik

Dergi:

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

Belge Tipi:

Makale

Yayın Tarihi:

3/2012

Belge Dili:

İngilizce

Document ID (Org No.):

2000727577

Sıklık:

İki Aylık

eISSN:

1303-6130

pISSN:

1300-0527