Cover Image

Extraction-photometric determination of cadmium(II) using 1-(5-benzylthiazol-2-yl)azonaphthalen-2-ol

Andriy M. Tupys, Oleksandr S. Tymoshuk

Abstract


For the first time, the absorption spectra of 1-(5-benzylthiazol-2-yl)azonaphthalen-2-ol were investigated in such solvents as ethanol, toluene, chloroform and carbon tetrachloride. Cadmium(II) ion interacts with 1-(5-benzylthiazol-2-yl)azonaphthalen-2-ol forming a violet chelate complex (λmax = 595 nm) which can be extracted into toluene from the alkaline aqueous solution. The complex compound has a molar absorptivity of 1.9∙104 L∙mol–1∙cm–1. The stoichiometric ratio of reagent to Cd(II) in complex is equal 2:1 that was established using spectrophotometric (mole-ratio method and method of continuous variations) and voltammetric methods. Optimum reaction conditions for complexation were found, an extraction-photometric method for the determination of Cd2+-ions has been proposed with determination limit of 0.3 μg∙ml–1. Zn(II), Mn(II), Ti(III) and Fe(III) ions do not have an influence on the Cd(II) determination. Interference from such ions as Co(II), Cu(II), Ag(I) and Ni(II) was shown.

Keywords


cadmium(II); thiazolylazonaphthol dies; spectrophotometry; extraction; chelate

References


Lemos, V. A., Santos, E. S., Santos, M. S. & Yamaki, R. T. (2007). Thiazolylazo dyes and their application in analytical methods. Microchim. Acta, 158, 189–204.

Chen, J. & Teo, K. Ch. (2001). Determination of cadmium, copper, lead and zinc in water samples by flame atomic absorption spectrometry after cloud point extraction. Anal. Chim. Acta, 450, 215–222.

Nedeltcheva, T., Atanassova, M., Dimitrov, J. & Stanislavova, L. (2005). Determination of mobile form contents of Zn, Cd, Pb and Cu in soil extracts by combined stripping voltammetry. Anal. Chim. Acta, 528, 143–146.

Drapkina, D. A., Brudz’, V. G. & Smirnowa, K. A. (1962). Photometric Determination of Cadmium Using Brombenzthiazo. J. Anal. Chem., 17(8), 940–944.

Shkrobot, E. P. & Bakinowskaya, L. M. (1966) [Photometric Method of Cadmium Determination in Non-ferrous Metal Products]. Zavod. Lab. – Fact. Lab., 32(12), 1452–1455 (in Russian).

Khosraviani, M., Pavlov, A. R. & Flowers, G. C. (1998) Detection of Heavy Metals by Immunoassay: Optimization and Validation of a Rapid, Portable Assay for Ionic Cadmium. Environ. Sci. Technol., 32, 137–142.

Abalos, T., Moragues, M. & Royo, S. (2012) Dyes That Bear Thiazolylazo Groups as Chromogenic Chemosensors for Metal Cations. Eur. J. Inorg. Chem., 2012, 76–84.

Goswami, A. & Singh, A. K. (2002) 1,8-dihydroxy-anthraquinone anchored on silica gel: synthesis and application as solid phase extractant for lead(II), zinc(II) and cadmium(II) prior to their determination by flame atomic absorption spectrometry. Talanta, 58, 669–678.

Burham, N., Abdel-Azeem, S. M. & El-Shahat, M. F. (2006) Separation and determination of trace amounts of zinc, lead, cadmium and mercury in tap and Qaroun lake water using polyurethane foam functionalized with 4-hydroxytoluene and 4-hydroxyacetophenone. Anal. Chim. Acta, 579, 193–201.

Zhang, G., Wang, Sh., Ma, J. Sh. & Yang, G. (2014) Syntheses, characterization and third-order nonlinear optical properties of a class of thiazolylazo-based metal complexes. Inorg. Chim. Acta, 384, 97–104.

Mohamed, G. G., El-Gamel, N. E. A. & Teixidor, F. (2001) Complexes of 2-(2-benzimidazolylazo)-4-acetamido-phenol, a phenoldiazenyl-containing ligand. Could this be a moiety suitable for Zn and Cd extraction? Polyhedron, 20, 2689–2696.

Gaber, M., El-Baradie, K. Y. & El-Sayed, Y. S. Y. (2008) Spectral and thermalstudies of 4-(1H-pyrazolo {3,4-d} pyrimidin-4-ylazo)benzene-1,3-diol complexes of cobalt(II), nickel(II) and copper(II). Spectrochim. Acta Part A, 69, 534–541.

Chavan, S. S., Yamgar, B. A. & Bharate, B. G. (2013) Zn(II) and Cd(II)-azido/thiocyanato complexes with thiazolylazo dye and triphenylphosphine: synthesis, characterization and fluorescence. J. Coord. Chem., 66(10), 1837–1846.

Dickey, J. B., Towne, E. B. & Bloom, M. S. (1955) Azo dyes from substituted 2-aminothiazoles. J. Org. Chem, 20(4), 499–510.

Nazarenko, V. A., Antonovych, V. P. & Nevskaya, Ye. M. (1979). [Hydrolysis of Metal Ions in Diluted Solutions]. Moscow, USSR: Atomizdat (in Russian).

Tupys, A. & Tymoshuk, O. (2011) [Extraction-photometric Investigation of Zn(II) Interaction Using 1-(5-Benzyl-2-thiazol)-azo-2-naphthol]. Visn. Lviv Univ.: Khim. – Bull. Lviv Univ.: Chem., 52, 197–202 (in Ukrainian).

Marczenko, Z. & Balcerzak, M. (2001). Separation, preconcentration and spectrophotometry in inorganic analysis. Amsterdam: Elsevier.

Тupys, A. M. & Тymoshuk, O. S. (2014). Ukraine Patent No 90459. Lviv, Ukraine. Ivan Franko National University of Lviv.




DOI: http://dx.doi.org/10.15421/081507

Refbacks

  • There are currently no refbacks.




Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.

______________________________________________________
BULLETIN OF DNIPROPETROVSK NATIONAL UNIVERSITY
eISSN: 2313-4984 | pISSN: 2306-871X
Contact:chem.dnu@gmail.com
The journal publishes research papers on terms: Creative Commons Attribution 4.0 International License
Founder: Oles Honchar Dnipropetrovsk National University