钕(Ⅲ)—泛酸配合物稳定常数的吸收光谱法测定

DETERMINATION OF ABSORPTION SPECTROSCOPY ON STABILITY CONSTANTS OF Nd(Ⅲ) COMPLEX WITH PANTOTHENATE

电位法测定了DL-泛酸的离解常数.利用Nd^(3+)离子超灵敏跃迁(~4I_(9/2)→~2,4G_(7/2,5/2)的振子强度伴随配体浓度的变化,确定了水溶液中钕(Ⅲ)—泛酸配合物的累积稳定常数lgβ_i分别为2.01,3.87,5.60.

The dissociation constants of DL-pantothcnate have been determined. Stability constants of the Nd(Ⅲ) pantothenate complexes in solution have been calculated from the oscillator strength of hypersensitive transition of Nd(Ⅲ) ion with change of ligand concentration.