KINETIC-CATALYTIC DETERMINATION OF ULTRAMICRO AMOUNTS OF Co(II) USING 4-HYDROXYCOUMARINE-PERMANGANATE REDOX REACTION
Determination of Co(II) based on its catalytic effect on the reaction between 4-hydroxycoumarine and potassium permanganate, in the presence of acetate buffer was described. The method development includes optimization of the reagent concentration and temperature. Absorbance of potassium permanganate was measured at 525 nm. The calibration curve was linear in the range of 0.5 - 4 ng/cm3 of Co(II). The relative standard deviation was in the interval 6.25-2.60 % of the concentration range of 0.6-3 ng/cm3 Co(II), respectively. The interference effects of foreign ions were determined for the assessment of the selectivity of the method. The proposed method was found to have excellent sensitivity, relatively good selectivity and simplicity.
Bahram, M., & Khezri, S. 2012. Multivariate optimization of cloud point extraction for the simultaneous spectrophotometric determination of cobalt and nickel in water samples. Anal. Methods, 4(2), pp. 384-393. doi:10.1039/c2ay05527a
Ghasemi, J., Niazi, A., & Safavi, A. 2001. Simultaneous catalytic determination of cobalt, nickel and cooper using resazurine sulfide reaction and partial square s calibration method. Analytical Letters, 34(8), pp. 1389-1399. doi:10.1081/al-100104162
Jiang, H., Qin, Y., & Hu, B. 2008. Dispersive liquid phase microextraction (DLPME) combined with graphite furnace atomic absorption spectrometry (GFAAS) for determination of trace Co and Ni in environmental water and rice samples. Talanta, 74(5), pp. 1160-1165. doi:10.1016/j.talanta.2007.08.022
Juvonen, R., Lakomaa, T., & Soikkeli, L. 2002. Determination of gold and the platinum group elements in geological samples by ICP-MS after nickel sulphide fire assay: difficulties encountered with different types of geological samples. Talanta, 58(3), pp. 595-603. doi:10.1016/s0039-9140(02)00330-2
Kamble, G.S., Ghare, A.A., Kolekar, S.S., Han, S.H., & Anuse, M.A. 2011. Development of an reliable analytical method for synergistic extractive spectrophotometric determination of cobalt(II) from alloys and nano composite samples by using chromogenic chelating ligand. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 84(1), pp. 117-124. doi:10.1016/j.saa.2011.09.015
Kiran, B.V., Dubey, S., & Rao, B.S. 2012. Kinetic-Spectrphotometric Determination of Co(II) in Vegetable Samples by Using indigo-carmine. International Journal of Pharmaceutical Research, 4(3), pp. 64-68.
Li, Y. 1998. Catalytic kinetic spectrophotometric determination of trace cobalt(II). Huaxue Fence, 34, pp. 408-409.
Medina-Escriche, J., Hernández-Llorens, M.L., Llobat-Estelles, M., & Sevillano-Cabeza, A. 1987. Determination of vitamin B12 as cobalt by use of a catalytic spectrophotometric method. The Analyst, 112(3), pp. 309-311. doi:10.1039/an9871200309
Mikuła, B., & Puzio, B. 2007. Determination of trace metals by ICP-OES in plant materials after preconcentration of 1,10-phenanthroline complexes on activated carbon. Talanta, 71(1), pp. 136-140. doi:10.1016/j.talanta.2006.03.041
Mitić, S.S., Micić, R.J., & Budimir, M.V. 2009. Highly Sensitive Determination of Traces of Co(II) in Pharmaceutical and Urine Samples Using Kinetic–Spectrophotometric Method. Analytical Letters, 42(7), pp. 935-947. doi:10.1080/00032710902809017
Naseri, A., Bahram, M., & Mabhooti, M. 2011. A second-order standard addition method based on the data treatment by calculation of variation matrix of kinetic systems analyzed by MCR-ALS. Journal of the Brazilian Chemical Society, 22(11), pp. 2206-2215. doi:10.1590/s0103-50532011001100026
Safavi, A., Abdollahi, H., Hormozi, N.M.R., & Kamali, R. 2004. Cloud point extraction, preconcentration and simultaneous spectrophotometric determination of nickel and cobalt in water samples. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 60(12), pp. 2897-2901. doi:10.1016/j.saa.2004.02.001
Safavi, A., Abdollahi, H., & Nezhad, M.R.H. 2002. Indirect kinetic spectrophotometric determination of Co (II) based on the reaction with iron (III) in the presence of 1,10-phenantroline. Spectroscopy Letters, 35(5), pp. 681-688. doi:10.1081/sl-120014939
Suleiman, J.S., Hu, B., Xulli, P., Huang, C., & Jinag, Z. 2007. Nanometer sized zirconium dioxide microcolumn separation/preconcentration of trace metals and their determinatin by ICP-OES in environmental samples and biological samples. Microc. Acta, 159(3-4), pp. 379-385.
Wang, X. 2003. Catalytic spectrophotometric etermination of trace cobalt based on oxidation of alizarin green by H2O2. Yejin Fenxi, 23, pp. 17-18.
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