| Autor: |
Wu XH; College of Chemistry and Life Science, Zhejiang Normal University, Jinhua 321004, China., Miao JG, Miao YQ, Chen JR |
| Jazyk: |
čínština |
| Zdroj: |
Guang pu xue yu guang pu fen xi = Guang pu [Guang Pu Xue Yu Guang Pu Fen Xi] 2007 Jun; Vol. 27 (6), pp. 1168-71. |
| Abstrakt: |
The reaction of hemoglobin (Hb) with copper(II)-Alizarin red S (ARS) complex was studied in H3PO4-KH2PO4 buffer solution (pH 4. 2) by ultraviolet-visible spectrophotometry. The results show that the interaction of Hb and Cu(II)-ARS complex produces red ionic association complex with its maximum absorption peak at 537 nm. At the maximum absorption, the composition of the complex was determined to be n(Hb) : n(Cu(II)) : n(ARS) =1 : 4 : 8, and the apparent molar absorptivity was 1.52 x 10(5) L x mol(-1) x cm(-1). The concentration of Hb is linear with the absorbency in the range of 1.0 x 10(-7)-2.0 x 10(-6) mol x L(-1) and the regression equation was established as A = 0.026 9 + 151 675c (mol x L(-1)) with the coefficient r = 0.997 2. The effects of solution acidity, reagent amount, reaction time, temperature, ionic strength and the added surfactant were examined on the formation of the Hb-Cu(II)-ARS complex. A preliminary investigation was carried out to elucidate the reaction mechanism, and it could be concluded that the Hb and Cu(II)-ARS complex are combined mainly by electrostatic attraction. Further investigation was also undertaken to find out the effects of common amino acids and metallic ions on the formation of Hb-Cu(II)-ARS complex. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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