Catalytic Spectrophotometric Determination of Chromium

Angelina Miltcheva STOYANOVA

Makale detayları

Catalytic Spectrophotometric Determination of Chromium

Yazarlar:

Angelina Miltcheva STOYANOVA

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Chemistry 2005 Vol.29 Issue 4, pp.367-375

Belge Tipi:

Makale

Yayın Tarihi:

3/2005

Belge Dili:

Türkçe

Document ID (Org No.):

2000729064

Sıklık:

İki Aylık

eISSN:

1303-6130

pISSN:

1300-0527

Özet:

 

The catalytic effect of chromium(III) and chromium(VI) on  the oxidation of sulfanilic acid by hydrogen peroxide was studied.   The reaction was followed spectrophotometrically by measuring the  absorbance of the reaction product at 360 nm.  Under the optimum  conditions 2 calibration graphs (for chromium(III) up to 100 ng  mL-1, and for chromium(VI) up to 200 ng mL-1) were obtained,  using the fixed time'' method with detection limits of 4.9 ng  mL-1 and 3.8 ng mL-1, respectively.  The results suggest that at the reaction conditions chromium(VI) is  reduced and chromium(III) is oxidized to an intermediate oxidation  state and the catalytic action of chromium is due to the formation of  an active complex between oxidant, catalyst and substrate.  A new catalytic spectrophotometric method for the determination of  chromium was developed.  The proposed method was successfully applied  to chromium determination in tap and industrial waters.

 

The catalytic effect of chromium(III) and chromium(VI) on  the oxidation of sulfanilic acid by hydrogen peroxide was studied.   The reaction was followed spectrophotometrically by measuring the  absorbance of the reaction product at 360 nm.  Under the optimum  conditions 2 calibration graphs (for chromium(III) up to 100 ng  mL-1, and for chromium(VI) up to 200 ng mL-1) were obtained,  using the fixed time'' method with detection limits of 4.9 ng  mL-1 and 3.8 ng mL-1, respectively.  The results suggest that at the reaction conditions chromium(VI) is  reduced and chromium(III) is oxidized to an intermediate oxidation  state and the catalytic action of chromium is due to the formation of  an active complex between oxidant, catalyst and substrate.  A new catalytic spectrophotometric method for the determination of  chromium was developed.  The proposed method was successfully applied  to chromium determination in tap and industrial waters.

Makale detayları

Catalytic Spectrophotometric Determination of Chromium

Yazarlar: Angelina Miltcheva STOYANOVA

Yayıncı: TUBITAK

Dergi: Turkish Journal of Chemistry 2005 Vol.29 Issue 4, pp.367-375

Belge Tipi: Makale

Yayın Tarihi: 3/2005

Belge Dili: Türkçe

Document ID (Org No.): 2000729064

Sıklık: İki Aylık

eISSN: 1303-6130

pISSN: 1300-0527

Sayı

Yazarlar:

Angelina Miltcheva STOYANOVA

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Chemistry 2005 Vol.29 Issue 4, pp.367-375

Belge Tipi:

Makale

Yayın Tarihi:

3/2005

Belge Dili:

Türkçe

Document ID (Org No.):

2000729064

Sıklık:

İki Aylık

eISSN:

1303-6130

pISSN:

1300-0527