Chinese Journal of Applied Chemistry ›› 1990, Vol. 0 ›› Issue (3): 10-13.

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STUDY ON MIXED LIGAND COMPLEXES OF RARE EARTH WITH NITRILOTRIACETIC ACID AND AMINO ACID

Gao Feng, Niu Chunji, Ni Jiazuan   

  1. Changchun Institute of Applied Chemistry, Academia Sinica, Changchun 130022
  • Received:1989-07-06 Revised:1989-10-25 Published:1990-06-10 Online:1990-06-10

Abstract: The stability constants for mixed ligand complexes of rare earth with nitrilotriacetic acidas primary ligand and amino acid as secondary ligand have been determined by potentiometrictitration at 25℃ and an ionic strength of 0.15mol/dm3(NaCl). A discussion on the relation-.ship between the stability constants for the mixed ligand complexes and the atomic numberof rare earth has been made. It was found that the position of Y in the ternary systemshifted to the vicinity of neodymium.

Key words: Rare earth, amino acid, nitrilotriacetic acid, mixed ligand complexes