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Evaluation of thallium rate in soil after dispersive liquid-liquid micro-extraction | ||
| Desert | ||
| مقاله 3، دوره 20، شماره 1، فروردین 2015، صفحه 23-28 اصل مقاله (83.3 K) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22059/jdesert.2015.54079 | ||
| نویسندگان | ||
| Seyyed Behnam Abdollahi Boraei* 1؛ Daryoush Afzali2 | ||
| 1Materials Engineering Department, Faculty of Modern Science & Technologies, University of Advanced Technology, Kerman, Iran | ||
| 2Chemistry Department, Faculty of Modern Science & Technologies, University of Advanced Technology, Kerman, Iran | ||
| چکیده | ||
| Thallium is widely found in nature, but the only inorganic stones full of this element are crookesite and lorandit. It is also found in pyrites of copper, lead and inorganic stones. The element and its compositions are toxic and harmful to the environment; therefore, its application requires caution and further research. It is important to develop sensitive and accurate analytical methods to determine trace levels of thallium in environmental and real samples. In this research, dispersive liquid-liquid microextraction based on solidification of floating organic drop as a sample preparation method was used for separation and preconcentration of ultra-trace amounts of thallium in soil samples prior to graphite-furnace atomic-absorption spectrometry. Investigated effective parameters on extraction include pH, the amount of chelating agent, type and volume of extraction solvent and extraction time. Under optimum conditions, the calibration curve was linear in the range of 0.2-10.0 ng mL−1 of thallium in the original solution, with limit of detection of 0.03 ng mL−1. The relative standard deviation (RSD) for ten replicated determinations of thallium ion at 5.0 ng mL−1 concentration level was calculated as 3.3%. The proposed method was successfully applied to the determination of thallium in soil samples. | ||
| کلیدواژهها | ||
| Soil samples؛ thallium determination؛ dispersive liquid-liquid microextraction؛ graphite-furnace atomicabsorption spectrometry | ||
| مراجع | ||
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Afzali, D., B. Bahadori, F. Fathirad, 2013. Ultrasoundassisted emulsification/microextraction based on solidification of trace amounts of thallium prior to graphite furnace atomic absorption spectrometry determination. Toxicological & Environmental Chemistry, 95; 1080-1089. Asami, T., C. Mizui, T. Shimada, M. Kubota, 1996. Determination of thallium in soils by flame atomic absorption spectrometry. Fresenius Journal of Analytical Chemistry, 356; 348-351. Arzate, S.G., A. Santamaria, 1998. Thallium toxicity. Toxicology Letters, 99; 1-13. Breimer, R.F., J. Vogel, C.G. Ottow, 1989. Fluorine contamination of soils and earthworms (Lumbricus spp.) near a site of long-term industrial emission in southern Germany. Biology and Fertility of Soils, 7; 297-302. Chamsaz, M., M.H. Arbab-Zavar, A. Darroudi, T. Salehi, 2009. Preconcentration of thallium (I) by single drop microextraction with electrothermal atomic absorption spectroscopy detection using dicyclohexano-18-crown- 6 as extractant system. Journal of Hazardous Materials, 167; 597-601. Dadfarnia, S., T. Assadollahi, A.M. Haji Shabani, 2007. Speciation and determination of thallium by on-line microcolumn separation/preconcentration by flow injection–flame atomic absorption spectrometry using immobilized oxine as sorbent. Journal of Hazardous Materials, 148; 446-452. Dadfarnia, S., A.M. Haji Shabani, 2010. Recent development in liquid phase microextraction for determination of trace level concentration of metals. Analytica Chimica Acta, 658; 107-119. Escudero, L.B., R.G. Wuilloud, R.A. Olsina. 2013. Sensitive determination of thallium species in drinking and natural water by ionic liquid-assisted ion-pairing liquid–liquid microextraction and inductively coupled plasma mass spectrometry. Journal of Hazardous Materials, 244–245; 380-386.4 Gao, J., G. Gu, X. Liu, T. Chen, 1985. Spectrophotometric determination of trace amounts of thallium with 7-(4,5- dimethylthiazolyl-2-azo)-8-hydroxyquinoline-5- sulphonic acid. Talanta, 32; 1072-1073. Gworek, B., 1992. Inactivation of cadmium in contaminated soils using synthetic zeolites. Environmental pollution, 75; 269-271. Hawley, G.G., R.J. Lewis, 1993. Condensed Chemical Dictionary. 12th ed., Van Nostrand, New York. Jamshidi, R., D. Afzali, Z. Afzali, 2011. Determination trace amounts of thallium after separation andpreconcentration onto nanoclay loaded with 1-(2- pyridylazo)-2-naphthol as a new sorbent. International Journal of Environmental Analytical Chemistry, 91; 821-827. Janssen, M.P., R. Hogervorst, 1993. Metal accumulation in soil arthropods in relation to micro-nutrients. Environmental Pollution, 79; 181-189. Lee, G., H.M. Lee, Y.R. Uhm, M.K. Lee, C. Rhee, 2008. Square-wave voltammetric determination of thallium using surface modified thick-film graphite electrode with Bi nanopowder. Electrochemistry Communications. 10; 1920-1923. Nukatsuka, I., H. Seitoh, K. Ohzeki, 2004. Solid-phase extraction with slurry injection of the resin into ETAAS for trace determination of thallium in natural water. Microchimica Acta, 148; 177-182. Otruba, V., J. Stepankova, J., Sommer, 1994. Selective preconcentration of thallium on modified silica gel for its determination by flame emission and absorption spectrometry. Talanta, 41; 1185-1190. Regueiro, J., M. Llompart, C. Garcia-Jares, J.C. Garcia- Monteagudo, R. Cela, 2008. Ultrasound- assisted emulsification–microextraction of emergent contaminants and pesticides in environmental waters. Journal of Chromatography A, 1190; 27-38. | ||
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