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Synthesis and Characterization of 2-(2-Thiazolylazo)-5-[(N,N-dicarboxymethyl)amino]Benzoic Acid and Its Application to Spectrophotometry Determination of Microamounts of Palladium in Catalysts

✍ Scribed by Lihong Wang; Fulong Tang

Publisher: Elsevier Science
Year: 1996
Tongue: English
Weight: 96 KB
Volume: 53
Category: Article
ISSN: 0026-265X
DOI: 10.1006/mchj.1996.0050

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✦ Synopsis

A new water-soluble chromogenic reagent, namely 2-(2-thiazolylazo)-5-[(N,N-dicarboxymethyl) amino]benzoic acid (TADCAB), is described in this paper. Its synthesis and spectrophotometric behaviors have been studied thoroughly. Its color reactions with various metal ions were investigated. The acid dissociation constants of the reagent and the stability constants of the complexes of Cu 2+ , Co 2+ , Ni 2+ , V(V), and Pd 2+ were determined. Application of the reagent to spectrophotometric determination of microamounts of palladium in Pt/Pd catalysts was shown.

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