Singh M K, Srivastava M N
Chemical Laboratories University of Allahabad AllahabadIndia.
Talanta. 1972 May;19(5):699-700. doi: 10.1016/0039-9140(72)80212-1.
The metal chelates of Zr(IV) and Th(IV) with aspartic and glutamic acids have been studied potentiometrically. Stepwise stability constants in 0.1 M sodium perchlorate at 25 degrees are reported as: aspartate chelates-log K(1) 9.70, log K(2) 6.85, and log K(3) 3.50 for Zr, and log k(1) 9.23, log K(2) 8.57, log K(3) 4.55 and log K(4) 3.87 for Th; glutamate chelates-log K(1) 9.60, log K(2) 6.40 and log K(3) 3.32 for Zr and log K(1) 9.11, log K(2) 8.52, log K(3) 4.18 and log K(4) 3.62 for Th.
已用电位分析法研究了锆(IV)和钍(IV)与天冬氨酸和谷氨酸形成的金属螯合物。报告了在25℃下0.1M高氯酸钠中的逐级稳定常数:天冬氨酸螯合物——锆的log K(1)为9.70,log K(2)为6.85,log K(3)为3.50;钍的log k(1)为9.23,log K(2)为8.57,log K(3)为4.55,log K(4)为3.87;谷氨酸螯合物——锆的log K(1)为9.60,log K(2)为6.40,log K(3)为3.32;钍的log K(1)为9.11,log K(2)为8.52,log K(3)为4.18,log K(4)为3.62。