Determination of Trace Amount of Pd(II) and Ni(II) with Newly Synthesized Pyrozlon Azo Bromo Phenol by Spectrophotometric Methods

Abstract

A sensitive and selective method has been developed for the determination of palladium(II) and nickel(II). A new reagent and two complexes have been prepared in aqueous solutions. The method is based on the chelation of metal ions with 4-(4'- antipyriyl azo ) -2-bromo phenol (APBP) to form an intense color soluble products, that are stable and have a maximum absorption at 498 nm and at 433.5 nm and εmaxof 0.21×104and.0.38×104Lmole-1cm-1for Pd(II) Ni(II) respectively. A linear correlation of (0.2 - 3) and (0.6 -2.2) ppm for Pd(II) Ni(II) respectively. The stoichiometry of both complexes was found to be 1:2 (metal:ligand). The effect of various cations and anions on Pd(II) and Ni(II) determination have been investigated. The stability constants Pd(II) and Ni(II) were 0.37×108, 0.38×108L mol-1respectively. The conductivity measurements for complexes are consistent with those expected for an electrolyte. The optimum conditions for full color development for described methods were applied satisfactorily to synthetic mixtures samples and biological samples.

Fabrication of a novel palladium membrane sensor for its determination in environmental and biological samples

“…Table 3 contains the ndings of a comparison between optical sensor detection of Pd 2+ ions and spectrophotometric methods. [67][68][69][70][71][72][73][74][75][76][77][78] Unfortunately, there aren't many publications on optical sensors for evaluating Pd 2+ ions. It was established that the achieved optode is signicantly better than a number of available sensors for the monitoring of Pd 2+ ions.…”

Spectrophotometric Determination of Palladium(II) Ions Using a New Reagent: 4-(N’-(4-Imino-2-oxo-thiazolidine-5-ylidene)-hydrazino)-benzoic Acid (p-ITYBA)

“…As shown in the literature [7,8,20,[32][33][34][35][36][37], most spectrophotometric methods of palladium determination are characterized by not very high selectivity towards such cations as Ni(II), Co(II), Cu(II), Fe(III), Fe(II), Ag(I), REE (rare earth elements), platinum metals, and others. We investigated the effect of platinum metals and heavy and alkaline earth metal ions that can be present in the studied samples or can be introduced during dissolution.…”

“…e spectrophotometric methods are widely used to determine the palladium. Palladium provides intense-colored complexes with hydrazones, oximes, thiosemicarbazones, dithiocarbonates, thiazolilazo, nitroso dyes, and others [2,7,8].…”