Quantitative studies of complex formation from the determination of stability constants of the binary complexes of metal (II)/(III)- alizarin and also the mixed complexes of metal (II)/(III)- alizarin-NTA have been described using paper electrophoretic technique. The stability constant of metal-(II)/(III)-alizarin are found to be 105.14, 104.84, 104.44 and 104.14 and mixed complexes of metal (II)/(III) have been found 105.40,105.10,105.00 and 104.70 for Cr(III), Cu(II),Ni(II) and Zn(II) respectively at 350C and ionic strength I=0.1 mol dm-3 (HClO4).
通过测定
金属 (II)/(III)- 鞣红的二元络合物以及
金属 (II)/(III)- 鞣红 -
NTA 的混合络合物的稳定常数,利用纸电泳技术对络合物的形成进行了定量研究。在 350C 和离子强度 I=0.1 mol dm-3 (HClO4)条件下,发现
金属-(II)/(III)-
茜素的稳定常数分别为 105.14、104.84、104.44 和 104.14,
金属-(II)/(III)-
茜素的混合络合物分别为 105.40、105.10、105.00 和 104.70(Cr(III)、Cu(II)、Ni(II)和 Zn(II))。