Analytical chemistry council


ISSN title: "Metody i obʺekty himičeskogo analiza"

An international journal devoted to all aspects of Analytical chemistry

ISSN 2413-6166 (Online), ISSN 1991-0290 (Print)

Kiev University
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The Application of 1-(5-Benzylthiazol-2-yl)azonaphthalen-2-ol in Extraction-Photometric Analysis of the Main Soils Pollutants Content (Copper, Zinc, Cadmium and Lead)

A.M. Tupys*, O.S. Tymoshuk, P.V. Rydchuk

* Corresponding authors
Ivan Franko National University, Chemistry Faculty, Kyryla and Mefodia str., 6, Lviv, 79005, Ukraine

Methods Objects Chem. Anal., 2015, 10(2), p. 80-88

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The possibility of the extraction-photometric determination of Cu(II), Cd(II), Pb(II) and Zn(II) with a new organic reagent 1-(benzylthiazol-2-yl)azonaphthalen-2-ol (BnTAN) was investigated. The reagent creates chelate complex compounds with Cu(II), Cd(II) and Zn(II) ions (ε590(Cu(ІІ)) ≈ 2.2∙104 L∙mol-1∙cm-1, ε595(Cd(ІІ)) ≈ 1.9∙104 L∙mol-1∙cm-1, ε600(Zn(ІІ)) ≈ 2.1∙104 L∙mol-1∙cm-1). Optimal conditions for the extraction of Cu(II), Cd(II) and Zn(II) complexes into carbon tetrachloride were found. By means of the mole-ratio method and the method of continuous variations it was established that two molecules of BnTAN and one ion of the transition metal take part in the creation of the complex compound. Sensitive methods (Сmin ~ 2.0∙10-6 mol∙L-1) of Cu(II), Cd(II) and Zn(II) extractive-photometric determination were developed. The possibility of the consequent extraction-photometric determination of each metal was shown. Methods was tested on model solutions and applied for the determination of transition metals in alloys and soils.

Keywords: spectrophotometry, extraction, cooper, cadmium, zinc, thiazolylazonaphthol dyes

Article language: Ukr



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