Application of a ternary complex of tungsten(VI) with 4-nitrocatechol and thiazolyl blue for extraction-spectrophotometric determination of tungsten
-
V. Lekova
,
K. Gavazov
Abstract
A new ternary ion-association complex of tungsten(VI), 4-nitrocatechol (NC), and 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (Thiazolyl Blue, MTT) was obtained and studied using an extraction-spectrophotometric method. The optimum pH, reagent concentrations, and extraction time were determined. The composition of the complex was found to be W(VI): NC: MTT = 1: 2: 2. The extraction process was investigated quantitatively and the key constants were calculated. The molar absorptivity of the chloroform extract at λmax = 415 nm was 2.8 × 104 dm3 mol−1 cm−1, and the Beer’s law was obeyed up to 8.8 μg cm−3 tungsten(IV). The limit of detection and limit of quantification were calculated to be 0.27 μg cm−3 and 0.92 μg cm−3, respectively. The effect of foreign ions and reagents was studied and a competitive method for determination of tungsten in products from ferrous metallurgy was developed. The residual standard deviation and the relative error were 0.53 % and 0.2 %, respectively.
[1] Busev, A. I., Ivanov, V. M., and Sokolova, T. A., Analiticheskaya khimiya volframa. (Analytical Chemistry of Tungsten.) Nauka, Moscow, 1976. Search in Google Scholar
[2] Pilipenko, A. T. and Tananayko, M. M., Raznoligandnye i raznometallnye kompleksy i ikh primenenie v analiticheskoy khimii. (Different-Ligand and Different-Metal Complexes and their Use in Analytical Chemistry.) Khimiya, Moscow, 1983. Search in Google Scholar
[3] Nazarenko, V. A., Poluektova, E. N., and Shitareva, G. G., Zh. Anal. Khim. 28, 101 (1973). Search in Google Scholar
[4] Dimitrov, A., Alexandrov, A., Dimova, A., and Vrchlabský, M., Scr. Fac. Sci. Nat. Univ. Purk. Brun. 13, 117 (1983). Search in Google Scholar
[5] Dimitrov, A., Alexandrov, A., Hrdlička, A., and Vrchlabský, M., Scr. Fac. Sci. Nat. Univ. Purk. Brun. 14, 91 (1984). Search in Google Scholar
[6] Alexandrov, A., Dimitrov, A., Patcheva, A., and Vrchlabský, M., Scr. Fac. Sci. Nat. Univ. Purk. Brun. 15, 497 (1985). Search in Google Scholar
[7] Dimitrov, A. and Alexandrov, A., Anal. Lab. 4, 172 (1995). Search in Google Scholar
[8] Simeonova, Zh., Gavazov, K., and Alexandrov, A., Anal. Lab. 7, 184 (1998). Search in Google Scholar
[9] Dimitrov, A. and Kostova, S., Bulg. Chem. Ind. 70, 88 (1999). Search in Google Scholar
[10] Kostova, S., Dimitrov, A., and Alexandrov, A., Chem. Pap. 54, 66 (2000). Search in Google Scholar
[11] Gavazov, K., Simeonova, Zh., and Alexandrov, A., Zh. Neorg. Khim. 45, 142 (2000). Search in Google Scholar
[12] Gavazov, K., Simeonova, Zh., and Alexandrov, A., Talanta 52, 539 (2000). http://dx.doi.org/10.1016/S0039-9140(00)00405-710.1016/S0039-9140(00)00405-7Search in Google Scholar
[13] Gavazov, K., Simeonova, Zh., and Alexandrov, A., Zh. Neorg. Khim. 46, 494 (2001). Search in Google Scholar
[14] Dimitrov, A., Kostova, S., Pancheva, J., and Lekova, V., Bulg. Chem. Ind. 73, 20 (2002). Search in Google Scholar
[15] Dimitrov, A., Lekova, V., Gavazov, K., and Boyanov, B., Cent. Eur. J. Chem. 3, 747 (2005). http://dx.doi.org/10.2478/BF0247520210.2478/BF02475202Search in Google Scholar
[16] Poluektova, E. N. and Shitareva, G. G., Zh. Anal. Khim. 27, 1301 (1972). Search in Google Scholar
[17] Natansohn, S., Krugler, J. I., Lester, J. E., Chagnon, M. S., and Finocchiaro, R. S., J. Phys. Chem. 84, 2972 (1980). http://dx.doi.org/10.1021/j100459a02710.1021/j100459a027Search in Google Scholar
[18] Nazarenko, V. A. and Poluektova, E. N., Zh. Neorg. Khim. 14, 204 (1969). Search in Google Scholar
[19] Jander, G. and Krüecke, V., Z. Anorg. Allg. Chem. 265, 244 (1951). http://dx.doi.org/10.1002/zaac.1951265040810.1002/zaac.19512650408Search in Google Scholar
[20] Sasaki, J., Acta Chem. Scand. 15, 175 (1961). http://dx.doi.org/10.3891/acta.chem.scand.15-017510.3891/acta.chem.scand.15-0175Search in Google Scholar
[21] Bartušek, M., Collect. Czech. Chem. Commun. 38, 2255 (1973). Search in Google Scholar
[22] Fikr, J., Thesis. Purkyně University, Brno, 1964. Search in Google Scholar
[23] Bulatov, M. I. and Kalinkin, I. P., Prakticheskoe rukovodstvo po fotokolorimetricheskim i spectrofotometricheskim metodam analyza. (Practical Manual on Photocolorimetric and Spectrophotometric Methods of Analysis.) Khimiya, Leningrad, 1986. Search in Google Scholar
[24] Likussar, W. and Boltz, D., Anal. Chem. 43, 1265 (1971). http://dx.doi.org/10.1021/ac60304a00610.1021/ac60304a006Search in Google Scholar
[25] Fogg, A. G., Marriott, D. K., and Thorburn Burns, D., Analyst 95, 854 (1970). http://dx.doi.org/10.1039/an970950085410.1039/an9709500854Search in Google Scholar
[26] Eberle, A. R., Anal. Chem. 35, 669 (1963). http://dx.doi.org/10.1021/ac60199a05210.1021/ac60199a052Search in Google Scholar
[27] Zharovskii, F. G. and Gorina, D. O., Zh. Anal. Khim. 26, 766 (1971). Search in Google Scholar
[28] Chaprasova, L. P., Inoyatov, A., and Arzyntseva, L. G., Ind. Lab. 52, 1080 (1986). Search in Google Scholar
[29] Masti, S. P., Seetharamappa, J., and Melwanki, M. B., Anal. Sci. 18, 913 (2002). http://dx.doi.org/10.2116/analsci.18.91310.2116/analsci.18.913Search in Google Scholar PubMed
© 2006 Institute of Chemistry, Slovak Academy of Sciences
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Articles in the same Issue
- Influence of medium on the kinetics of oxidation of iron(II) ion with t-butyl hydroperoxide
- Synthesis of new thiazolo[2,3-b]pyrimidine derivatives of pharmaceutical interest
- Enthalpic analysis of the CaTiSiO5 system
- Kinetic, spectrophotometric determination of nanogram levels of manganese(II) using catalytic azo dye—potassium periodate—1,10-phenanthroline system
- Application of a ternary complex of tungsten(VI) with 4-nitrocatechol and thiazolyl blue for extraction-spectrophotometric determination of tungsten
- Determination of risperidone at picogram level in human urine by luminol—H2O2 chemiluminescence
- Electrochemical dissolution of chalcopyrite studied by voltammetry of immobilized microparticles
- Colon tissue concentrations of copper, iron, selenium, and zinc in colorectal carcinoma patients
- Structure of tetrakis(pyridinioacetate) neodymium(III) tetrahydrate perchlorate
- Thermally stable oligomer—Metal complexes based on oligo-ortho-aminophenol and oligophenylazomethinephenol
- Adsorption of SO2 on alumina
- One-pot, three-component synthesis of secondary amines and trisubstituted hydrazines from ketones
- Synthesis of α,α′-bis(R-benzylidene)cycloalkanones catalyzed by potassium hydrogen sulfate under solvent-free conditions
- Electrical conductivity of the molten KF—K2TaF7 system
- New substituted mono-and bis(imidazolyl)pyridines and their application in nitroaldolisation reaction
