Abstract
Analytical performance of conventional spectrophotometer was developed by coupling of effective dispersive liquid-liquid micro-extraction method with spectrophotometric determination for ultra-trace determination of cobalt. The method was based on the formation of Co(II)–alpha-benzoin oxime complex and its extraction using a dispersive liquid-liquid micro-extraction technique. During the present work, several important variables such as pH, ligand concentration, amount and type of dispersive, and extracting solvent were optimized. It was found that the crucial factor for the Co(II)–alpha benzoin oxime complex formation is the pH of the alkaline alcoholic medium. Under the optimized condition, the calibration graph was linear in the ranges of 1.0–110 μg L−1 with the detection limit (S/N = 3) of 0.5 μg L−1. The preconcentration operation of 25 mL of sample gave enhancement factor of 75. The proposed method was applied for determination of Co(II) in soil samples.
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Amin, A. S. (2014). Study on the solid phase extraction and spectrophotometric determination of cobalt with 5-(2-benzothiazolylazo)-8-hydroxyquinolene. Arabian Journal of Chemistry, 7, 715–721.
Baghban, N., Haji Shabani, A. M., Dadfarnia, S., & Jafari, A. A. (2009). Flame atomic absorption spectrometric determination of trace amounts of cobalt after cloud point extraction as 2-[(2-mercaptophenylimino)methyl]phenol complex. Journal of the Brazilian Chemical Society, 20, 832–838.
Baliza, P. X., Teixeira, L. S. G., & Lemos, V. A. (2009). A procedure for determination of cobalt in water samples after dispersive liquid–liquid microextraction. Microchemical Journal, 93, 220–224.
Barałkiewicz, D., & Siepak, J. (1999). Chromium, nickel and cobalt in environmental samples and existing legal norms. Polish Journal of Environmental Studies, 8, 201–208.
Berton, P., Martinis, E. M., Martinez, L. D., & Wuilloud, R. G. (2012). Selective determination of inorganic cobalt in nutritional supplements by ultrasound-assisted temperature-controlled ionic liquid dispersive liquid phase microextraction and electrothermal atomic absorption spectrometry. Analytica Chimica Acta, 713, 56–62.
Beyersmann, D., & Hartwig, A. (1992). The genetic toxicology of cobalt. Toxicology and Applied Pharmacology, 115, 137–145.
Farajzadeh, M. A., Bahram, M., & Vardast, M. R. (2009). Optimization of dispersive liquid-liquid microextraction of Co(II) and Fe(III) as their oxinate chelates and analysis by HPLC: application for the simultaneous determination of Co(II) and Fe(III) in water samples. Journal of Separation Science, 32, 4200–4212.
Garten, R. P. H., Bubert, H., & Palmetshofer, L. (1992). Neutron activation analysis for reference determination of the implantation dose of cobalt ions. Analytical Chemistry, 64, 1100–1105.
Gharehbaghi, M., Shemirani, F., & Baghdadi, M. (2008). Dispersive liquid–liquid microextraction and spectrophotometric determination of cobalt in water samples. International Journal of Environmental and Analytical Chemistry, 88, 513–523.
Kajic, P., Milosev, I., Pihlar, B., & Pisot, V. (2003). Determination of trace cobalt concentrations in human serum by adsorptive stripping voltammetry. The Journal of Trace Elements in Medicine and Biology, 17, 153–158.
Martin-Camean, A., Jos, A., Calleja, A., Gil, F., Iglesias-Linares, A., Enrique, S., & Camean, A. M. (2014). Development and validation of an inductively coupled plasma mass spectrometry (ICP-MS) method for the determination of cobalt, chromium, copper and nickel in oral mucosa cells. Microchemical Journal, 114, 73–79.
Mirzaei, M., Behzadi, M., Abadi, N. M., & Beizaei, A. (2011). Simultaneous separation/preconcentration of ultra trace heavy metals in industrial wastewaters by dispersive liquid–liquid microextraction based on solidification of floating organic drop prior to determination by graphite furnace atomic absorption spectrometry. Journal of Hazardous Materials, 186, 1739–1743.
Ojeda, C. B., & Rojas, F. S. (2009). Separation and preconcentration by dispersive liquid–liquid microextraction procedure: a review. Chromatographia, 69, 1149–1159.
Ojeda, C. B., Rojas, F. S., & Cano Pavon, M. (2012). Determination of cobalt in food, environmental and water samples with preconcentration by dispersive liquid-liquid microextraction. American Journal of Analytical Chemistry, 3, 125–130.
Ojeda, C. B., Rojas, F. S., & Cano Pavon, M. (2013). Simultaneous separation/preconcentration of nickel and cobalt by dispersive liquid-liquid microextraction prior to determination by FAAS. European Scientific Journal, 9, 20–31.
Paleologos, E. K., Prodromidis, M. I., Giokas, D. L., Pappas, A. C., & Karayannis, M. I. (2002). Highly selective spectrophotometric determination of trace cobalt and development of a reagentless fiber-optic sensor. Analytica Chimica Acta, 467, 205–215.
Pourreza, N., Fathi, M. R., & Ardan, Z. (2010). Flame atomic absorption spectrometric determination of Cd(II), Ni(II), Co(II) and Cu(II) in tea and water samples after simultaneous preconentration of dithizone loaded on naphthalene. Journal of Iranian Chemical Society, 7, 965–971.
Ranjbar, L., Yamini, Y., Saleh, A., Seidi, S., & Faraji, M. (2012). Ionic liquid based dispersive liquid-liquid microextraction combined with ICP-OES for the determination of trace quantities of cobalt, copper, manganese, nickel and zinc in environmental water samples. Microchimica Acta, 177, 119–127.
Rastegarzadeh, S., Pourreza, N., & Larki, A. (2013). Dispersive liquid–liquid microextraction of thiram followed by microvolume UV–vis spectrophotometric determination. Spectrochimica Acta Part A, 46, 46–50.
Rutyna, I., & Korolczuk, M. (2011). Catalytic adsorptive stripping voltammetry of cobalt in the presence of nitrite at an in situ plated bismuth film electrode. Electroanalysis, 23, 637–641.
Shokoufi, N., Shemirani, F., & Assadi, Y. (2007). Fiber optic-linear array detection spectrophotometry in combination with dispersive liquid–liquid microextraction for simultaneous preconcentration and determination of palladium and cobalt. Analytica Chimica Acta, 597, 349–356.
Silva, E. S., Correia, L. O., Santos, L. O., Vieira, E. V. S., & Lemos, V. A. (2012). Dispersive liquid-liquid microextraction for simultaneous determination of cadmium, cobalt, lead and nickel in water samples by inductively coupled plasma optical emission spectrometry. Microchimica Acta, 178, 269–275.
Song, Z., Yue, Q., & Wang, C. (2006). Flow injection chemiluminescence determination of femtogram-level cobalt in egg yolk, fish tissue and human serum. Food Chemistry, 94, 457–463.
Wen, X., He, L., Shi, C., Deng, Q., Wang, J., & Zhao, X. (2013). Application of rapid cloud point extraction method for trace cobalt analysis coupled with spectrophotometric determination. Spectrochimica acta part A: molecular and biomolecular spectroscopy, 115, 452–456.
Yang, F. Y., Jiang, S. J., & Sahayam, A. C. (2014). Combined use of HPLC-ICP-MS and microwave-assisted extraction for the determination of cobalt compounds in nutritive supplements. Food Chemistry, 147, 215–219.
Yousefi, S. R., & Ahmadi, S. J. (2011). Development a robust ionic liquid-based dispersive liquid-liquid microextraction against high concentration of salt combined with flame atomic absorption spectrometry using microsample introduction system for preconcentration and determination of cobalt in water and saline samples. Microchimica Acta, 172, 75–82.
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Hasanpour, F., Hadadzadeh, H., Taei, M. et al. Sensitive spectrophotometric determination of Co(II) using dispersive liquid-liquid micro-extraction method in soil samples. Environ Monit Assess 188, 265 (2016). https://doi.org/10.1007/s10661-016-5263-x
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DOI: https://doi.org/10.1007/s10661-016-5263-x