Kunihiro Watanabe, M. Hojjatie, Toshikiyo Nakamura
1989
Citations
0
Influential Citations
10
Citations
Journal
Analytica Chimica Acta
Abstract
Abstract 2-Mercaptobenzamide (MBA) was investigated as a reagent for the extraction of palladium. The palladium complex of MBA was extracted into tributyl phosphate (TBP). The pKa of the ligand was 5.45 with the stability constant of the palladium complex β2=107.1. The composition of the complex in TBP was Pd:MBA:TBP=1:2:2. Addition of sodium chloride accelerated the rate of extraction. Various interfering ions could be masked with EDTA; Ag(I), Au(III), Os(VIII), Se(IV), Te(IV) etc. interfered. The molar absorptivity was 1.59×104 l mol−1 cm−1; 1–35 μg Pd could be determined at pH 6.0.