Disposable carbon electrodes as an alternative for the direct voltammetric determination of alkyl phenols from water samples

İulia Gabriela DAVID

Makale detayları

Disposable carbon electrodes as an alternative for the direct voltammetric determination of alkyl phenols from water samples

Yazarlar:

İulia Gabriela DAVID

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Chemistry 2013 Vol.37 Issue 1, pp.91-100

Belge Tipi:

Makale

Yayın Tarihi:

12/2012

Belge Dili:

Türkçe

Document ID (Org No.):

2000727491

Sıklık:

İki Aylık

eISSN:

1303-6130

pISSN:

1300-0527

Özet:

 

Disposable sensors based on a pencil graphite electrode were described for detection of alkyl phenols.  The performances of the disposable bare pencil graphite electrode (PGE) and PGE modified with carbon nanotubes, regarding the cyclic and differential pulse  voltammetric determination of 4-nonylphenol, 4-octylphenol, and  4-tert-octylphenol, were compared.  Some experimental variables of the electrode surface pretreatment and measurement parameters were  optimized.  Using a phosphate buffer solution (pH 7.40) as the  supporting electrolyte, alkyl phenols gave a well-defined oxidation  peak at about 700 mV vs.  Ag/AgCl.  The detection limits established  for each alkyl phenol were: 0.25 mM for 4-octylphenol, 0.42 mM for 4-nonylphenol, and 0.77 mM for 4-tert-octylphenol.  This method is suitable for the direct determination of the total content of these pollutants found at micromolar levels in water samples.  The results obtained applying this method are in good agreement with those obtained by high-performance liquid chromatography.  The developed sensor has shown some advantages such as low cost,  sensitivity, and capability to generate reproducible results using a  simple and direct electrochemical protocol.  By using this type of  commonly available disposable working electrode and a portable  electrochemical analysis system, the developed method can be applied  to the determination of alkyl phenols directly at the sampling point.

 

Disposable sensors based on a pencil graphite electrode were described for detection of alkyl phenols.  The performances of the disposable bare pencil graphite electrode (PGE) and PGE modified with carbon nanotubes, regarding the cyclic and differential pulse  voltammetric determination of 4-nonylphenol, 4-octylphenol, and  4-tert-octylphenol, were compared.  Some experimental variables of the electrode surface pretreatment and measurement parameters were  optimized.  Using a phosphate buffer solution (pH 7.40) as the  supporting electrolyte, alkyl phenols gave a well-defined oxidation  peak at about 700 mV vs.  Ag/AgCl.  The detection limits established  for each alkyl phenol were: 0.25 mM for 4-octylphenol, 0.42 mM for 4-nonylphenol, and 0.77 mM for 4-tert-octylphenol.  This method is suitable for the direct determination of the total content of these pollutants found at micromolar levels in water samples.  The results obtained applying this method are in good agreement with those obtained by high-performance liquid chromatography.  The developed sensor has shown some advantages such as low cost,  sensitivity, and capability to generate reproducible results using a  simple and direct electrochemical protocol.  By using this type of  commonly available disposable working electrode and a portable  electrochemical analysis system, the developed method can be applied  to the determination of alkyl phenols directly at the sampling point.

Makale detayları

Disposable carbon electrodes as an alternative for the direct voltammetric determination of alkyl phenols from water samples

Yazarlar: İulia Gabriela DAVID

Yayıncı: TUBITAK

Dergi: Turkish Journal of Chemistry 2013 Vol.37 Issue 1, pp.91-100

Belge Tipi: Makale

Yayın Tarihi: 12/2012

Belge Dili: Türkçe

Document ID (Org No.): 2000727491

Sıklık: İki Aylık

eISSN: 1303-6130

pISSN: 1300-0527

Sayı

Yazarlar:

İulia Gabriela DAVID

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Chemistry 2013 Vol.37 Issue 1, pp.91-100

Belge Tipi:

Makale

Yayın Tarihi:

12/2012

Belge Dili:

Türkçe

Document ID (Org No.):

2000727491

Sıklık:

İki Aylık

eISSN:

1303-6130

pISSN:

1300-0527