• Branka Petković Department of Chemistry, Faculty of Natural Sciences and Mathematics, University of Priština, Kosovska Mitrovica
  • Ružica Micić Department of Chemistry, Faculty of Natural Sciences and Mathematics, University of Priština, Kosovska Mitrovica
  • Ranko Simonović
Keywords: 4-hidroxycoumarine, tungsten(VI), inhibition, spectrophotometric determination, Kinetic method,


The present work describes a rapid and sensitive method for the determination of ultramicro amounts of tungsten (VI) based on its inhibitory effect on the oxidation of 4-hidroxycoumarine by potassium permanganate in the presence of hydrochloric acid. The sensitivity of the method is 20 ng/cm3. The probable relative error is -4.8-13 % for the W(VI) concentration range 250 to 20 ng/cm3, respectively. Kinetic equations for the investigated process which determine the order of the reactions regarding to each reaction parameter under certain experimental conditions were proposed, and they allowed quantification of the unknown concentrations W(VI) in solution. The detection and quantification limit of the method are 4.5 and 15.1 ng/cm3. The effects of certain foreign ions upon the reaction rate were determined for the assessing the selectivity of the method.


Author Biography

Ranko Simonović
Department of Chemistry, Faculty of Natural Sciences and Mathematics, University of Priština, Kosovska Mitrovica


Alekseev, V.N. 1973. Kurs kachestvenogo polumikro analiza. Moscow: Khimya.

Alvarado-Gámez, A.L., Alonso-Lomillo, M.A., Domínguez-Renedo, O., & Arcos-Martínez, M.J. 2015. A chronoamperometric screen printed carbon biosensor based on alkaline phosphatase inhibition for W(IV) determination in water, using 2-phospho-L-ascorbic acid trisodium salt as a substrate. Sensors (Basel), 15(2), pp. 2232-43. pmid:25621602.

-JIS G 1220. 1994. Iron and steel: Methods for determination of tungsten content.Tokyo: Japanese Industrial Standards Committee.

-JIS G 1258. 2000. Iron and steel: Methods for inductively coupled plasma atomic emission spectrometry (Amendment 1).Tokyo: Japanese Industrial Standards Committee.

Koutsospyros, A., Braida, W., Christodoulatos, C., Dermatas, D., & Strigul, N. 2006. A review of tungsten: From environmental obscurity to scrutiny. J. Hazard. Mater, 136, pp. 1-19.

L'vov, N.P., Nosikov, A.N., & Antipov, A.N. 2002. Tungsten-containing enzymes. Biochemistry Mosc., 67(2), pp. 196-200. pmid:11952415. doi:10.1023/A:1014461913945

Masti, S.P., Seetharamappa, J., & Melwanki, M.B. 2002. Extractive Spectrophotometric Determination of Tungsten(VI) in Alloy Steels Using Ethopropazine Hydrochloride. Analytical Sciences, 18(8), pp. 913-915. doi:10.2116/analsci.18.913

Micić, R.J., Simonović, R.M., & Petković, B.B. 2006. Kinetic Spectrophotometric Determination of Traces of Manganese(II) by Its Catalytic Effect on Oxidation of 4-Hidroxycoumarine with Potassium Permanganate in River Water Samples. Analytical Letters, 39, pp. 425-433.

Muller, H., Oto, M., & Werner, G. 1980. Katalytishe metoden in der spurenanalyse.Leipzig: Akademische Verlagsgesellschaft Geest und Portig K. G..

Petković, B.B., Simonović, R.M., & Micić, R.J. 2007. Determination of Ultramicroquantities of Au(III) by Its Catalytic Effect on 4-Hydroxyl Coumarone Oxidation with Potassium Permanganate. J. Anal. Chem., 62, pp. 697-700.

Rohilla, J., Baweja, R.K., & Kumar, S. 2013. Spectrophotometric determination of tungsten (VI) after extraction of its 6-chloro-3-hydroxy-2-phenyl-4-oxo-4H-1-benzopyran complex into chloroform. Arch. Appl. Sci. Res., 5, pp. 81-89.

Strekopytov, S.V., & Dubinin, A.V. 1997. Determination of Zr, Hf, Mo, W and Th in standard reference samples of ocean sediments by inductively coupled plasma mass spectrometry. J. Anal. Chem., 52, pp. 1171-1174.

Strigul, N. 2010. Does speciation matter for tungsten ecotoxicology. Ecotoxicol. Environ. Saf, 73, pp. 1099-1113.

Strigul, N., Koutsospyros, A., & Christodoulatos, C. 2010. Tungsten speciation and toxicity: Acute toxicity of mono- and poly-tungstates to fish. Ecotoxicol. Environ. Saf., 73, pp. 164-171.

Tajima, Y. 2003. 'The effects of tugstophosphate and tungtosiloicate on various stress promoters transformation', Escherichia Coli. J. Inorg. Biochem, 94, pp. 155-160.

Tanaka, T., Sakairi, Y., & Ishiyama, T. 2001. Determination of Tungsten in Iron and Steel by Adsorptiv Stripping Voltammetry. Anal. Sci., 17, pp. 949-952.

Zarei, K., Atabati, M., & Shoari, R. 2010. Catalytic adsorptive stripping voltammetry determination of ultratrace amount of thungsten using factorial design for optimization. J Anal. Chem., 65, pp. 518-524.

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