Abstract
The simple, rapid spectrophotometric method for palladium(II) ions determination using a new analytical reagent is described. The interaction of Pd(II) ions with a reagent, of the class of azolidones, 4-(N′-(4-imino-2-oxo-thiazolidine-5-ylidene)-hydrazino)-benzoic acid, in water medium results in the formation of a complex. The Pd(II)-p-ITYBA complex shows maximum absorbance at a wavelength of 450 nm. The molar absorptivity is 4.30 × 103 L·mol−1·cm−1. The optimal pH for complex formation is 7.0. The developed method has a wide linearity range of 0.64–10.64 µg·mL−1 for Pd(II). The detection limit is 0.23 µg·mL−1. It was found that Co(II), Ni(II), Zn(II), Fe(III), Cu(II), Al(III), and many anions do not interfere with the Pd(II) determination. The proposed method was tested in the analysis of model solutions and successfully applied for the determination of palladium in catalyst. The obtained results show that this method can be used for serial determinations of palladium in various objects.
Highlights
Among the all platinum metals, the palladium has the widest practical application in various branches of industries
Alloys that contain palladium are used during fuel cells creation [4,5,6]
We investigated the analytical properties of several new reagents of the class of azolidones proposed for the spectrophotometric determination of a number of elements: Pd(II), Pt(IV), Ir(IV), Rh(III), Ru(IV), Co(__), Ni(II), Cu(II), Hg(II), Cd(II), and Zn(II) [17,18,19,20,21,22,23,24,25,26,27,28,29]
Summary
Among the all platinum metals, the palladium has the widest practical application in various branches of industries. Palladium is a component of the scheme for the manufacture of nitric acid and petroleum. It is widely used in the production of synthetic polymers, in particular rubber and nylon. We investigated the analytical properties of several new reagents of the class of azolidones proposed for the spectrophotometric determination of a number of elements: Pd(II), Pt(IV), Ir(IV), Rh(III), Ru(IV), Co(__), Ni(II), Cu(II), Hg(II), Cd(II), and Zn(II) [17,18,19,20,21,22,23,24,25,26,27,28,29]. E obtained results were characterized by good metrological characteristics; we continue to synthesize new reagents of the class of azolidones and investigate them as analytical reagents. is work is devoted to the research of palladium ion interaction with reagent 4-(N′-(4-imino-2oxo-thiazolidine-5-ylidene)-hydrazino)-benzoic acid (pITYBA), which is a representative of the azolidones and was synthesized for the first time by our research group [30]
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