On-Line Preconcentration and Speciation of Chromium by an 8-Hydroxyquinoline Microcolumn Immobilized on Surfactant-Coated Alumina and Flow Injection Atomic Absorption Spectrometry

Seyyed Hamid AHMADI; Ali Mohammad Haji SHABANI

Makale detayları

On-Line Preconcentration and Speciation of Chromium by an 8-Hydroxyquinoline Microcolumn Immobilized on Surfactant-Coated Alumina and Flow Injection Atomic Absorption Spectrometry

Yazarlar:

Seyyed Hamid AHMADI | Ali Mohammad Haji SHABANI

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Chemistry 2007 Vol.31 Issue 2, pp.191-199

Belge Tipi:

Makale

Yayın Tarihi:

1/2007

Belge Dili:

Türkçe

Document ID (Org No.):

2000728757

Sıklık:

İki Aylık

eISSN:

1303-6130

pISSN:

1300-0527

Özet:

 

An on-line technique for the determination of chromium  species with atomic absorption spectrometry is described.  The method  is based on separation and preconcentration of Cr(III) on a  microcolumn of immobilized 8-hydroxyquinoline on surfactant-coated  alumina.  The adsorbed analyte is then eluted with 400 m L of 20%  ethanolic solution of 1.5 mol L-1 hydrochloric acid and is  transported to a flame atomic absorption spectrometer for  quantification.  The effects of pH, sample and eluent flow rate,  sorption capacity, and the presence of various cations and anions on  the sorption of Cr(III) were investigated.  The sorption was  quantitative in the pH 6-8 range, and for a sample volume of 35 mL a  preconcentration factor of 98 was obtained.  Total chromium was  determined by efficient reduction of Cr(VI) to Cr(III) with  hydroxylamine.  The method was applied to the determination of  chromium in electroplating wastewater samples.

 

An on-line technique for the determination of chromium  species with atomic absorption spectrometry is described.  The method  is based on separation and preconcentration of Cr(III) on a  microcolumn of immobilized 8-hydroxyquinoline on surfactant-coated  alumina.  The adsorbed analyte is then eluted with 400 m L of 20%  ethanolic solution of 1.5 mol L-1 hydrochloric acid and is  transported to a flame atomic absorption spectrometer for  quantification.  The effects of pH, sample and eluent flow rate,  sorption capacity, and the presence of various cations and anions on  the sorption of Cr(III) were investigated.  The sorption was  quantitative in the pH 6-8 range, and for a sample volume of 35 mL a  preconcentration factor of 98 was obtained.  Total chromium was  determined by efficient reduction of Cr(VI) to Cr(III) with  hydroxylamine.  The method was applied to the determination of  chromium in electroplating wastewater samples.

Makale detayları

On-Line Preconcentration and Speciation of Chromium by an 8-Hydroxyquinoline Microcolumn Immobilized on Surfactant-Coated Alumina and Flow Injection Atomic Absorption Spectrometry

Yazarlar: Seyyed Hamid AHMADI | Ali Mohammad Haji SHABANI

Yayıncı: TUBITAK

Dergi: Turkish Journal of Chemistry 2007 Vol.31 Issue 2, pp.191-199

Belge Tipi: Makale

Yayın Tarihi: 1/2007

Belge Dili: Türkçe

Document ID (Org No.): 2000728757

Sıklık: İki Aylık

eISSN: 1303-6130

pISSN: 1300-0527

Sayı

Yazarlar:

Seyyed Hamid AHMADI | Ali Mohammad Haji SHABANI

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Chemistry 2007 Vol.31 Issue 2, pp.191-199

Belge Tipi:

Makale

Yayın Tarihi:

1/2007

Belge Dili:

Türkçe

Document ID (Org No.):

2000728757

Sıklık:

İki Aylık

eISSN:

1303-6130

pISSN:

1300-0527