A simple spectrophotometric method for the determination of iron(II) aqueous solutions

M. Jamaluddin AHMED; Uttam Kumer ROY

Makale detayları

A simple spectrophotometric method for the determination of iron(II) aqueous solutions

Yazarlar:

M. Jamaluddin AHMED | Uttam Kumer ROY

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Chemistry 2009 Vol.33 Issue 5, pp.709-726

Belge Tipi:

Makale

Yayın Tarihi:

4/2009

Belge Dili:

Türkçe

Document ID (Org No.):

2000728237

Sıklık:

İki Aylık

eISSN:

1303-6130

pISSN:

1300-0527

Özet:

 

An ultra-sensitive and highly selective non-extractive  spectrophotometric method is presented for the rapid determination of  iron(II) at trace levels using 2', 3, 4', 5, 7-Pentahydroxyflavone  (morin) as a new spectrophotometric reagent in slightly acidic  solution (0.0001-0.0002 M H2SO4).  The reaction is instantaneous and  absorbance remains stable for over 24 h (lmax = 415 nm).  The  molar absorptivity was found to be 6.85 \times 104 L mol-1  cm-1.  Linear calibration graphs were obtained for 0.01-10 m g  mL-1 of FeII.  The stoichiometric composition of the chelate is  1:2 (Fe:morin).  Large excesses of over 50 cations, anions, and  complexing agents (e.g., tartrate, oxalate, citrate, phosphate,  thio-urea, SCN-) do not interfere in the determination.  The method  was successfully used in the determination of iron in several standard  reference materials (alloys and steels) as well as in some  environmental waters (portable and polluted), biological samples  (human blood and urine), food samples (arum, apple, egg, etc.), soil  samples, and some complex synthetic mixtures.  The method has high  precision and accuracy [s = \pm 0.001 for 0.5 m g L-1 (n = 5)]  over 24 h; 415 nm was used.

 

An ultra-sensitive and highly selective non-extractive  spectrophotometric method is presented for the rapid determination of  iron(II) at trace levels using 2', 3, 4', 5, 7-Pentahydroxyflavone  (morin) as a new spectrophotometric reagent in slightly acidic  solution (0.0001-0.0002 M H2SO4).  The reaction is instantaneous and  absorbance remains stable for over 24 h (lmax = 415 nm).  The  molar absorptivity was found to be 6.85 \times 104 L mol-1  cm-1.  Linear calibration graphs were obtained for 0.01-10 m g  mL-1 of FeII.  The stoichiometric composition of the chelate is  1:2 (Fe:morin).  Large excesses of over 50 cations, anions, and  complexing agents (e.g., tartrate, oxalate, citrate, phosphate,  thio-urea, SCN-) do not interfere in the determination.  The method  was successfully used in the determination of iron in several standard  reference materials (alloys and steels) as well as in some  environmental waters (portable and polluted), biological samples  (human blood and urine), food samples (arum, apple, egg, etc.), soil  samples, and some complex synthetic mixtures.  The method has high  precision and accuracy [s = \pm 0.001 for 0.5 m g L-1 (n = 5)]  over 24 h; 415 nm was used.

Makale detayları

A simple spectrophotometric method for the determination of iron(II) aqueous solutions

Yazarlar: M. Jamaluddin AHMED | Uttam Kumer ROY

Yayıncı: TUBITAK

Dergi: Turkish Journal of Chemistry 2009 Vol.33 Issue 5, pp.709-726

Belge Tipi: Makale

Yayın Tarihi: 4/2009

Belge Dili: Türkçe

Document ID (Org No.): 2000728237

Sıklık: İki Aylık

eISSN: 1303-6130

pISSN: 1300-0527

Sayı

Yazarlar:

M. Jamaluddin AHMED | Uttam Kumer ROY

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Chemistry 2009 Vol.33 Issue 5, pp.709-726

Belge Tipi:

Makale

Yayın Tarihi:

4/2009

Belge Dili:

Türkçe

Document ID (Org No.):

2000728237

Sıklık:

İki Aylık

eISSN:

1303-6130

pISSN:

1300-0527