Selective extraction of Cu+ and Cu2+ ions from mushroom and lichen samples prior to analysis by micro-volume UV-Vis spectrophotometry: Application of a novel poly (SMIm)-Tris-Fe3O4 nanocomposite |
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| Institution: | 1. University of Cumhuriyet, Faculty of Sciences, Department of Chemistry, TR-58140, Sivas, Turkey;2. University of Cumhuriyet, Faculty of Sciences, Department of Chemistry, Division of Physical Chemistry, TR-58140, Sivas, Turkey;3. University of Cumhuriyet, Faculty of Sciences, Department of Chemistry, Division of Inorganic Chemistry, TR-58140, Sivas, Turkey;4. University of Cumhuriyet, Faculty of Sciences, Department of Chemistry, Division of Analytical Chemistry, TR-58140, Sivas, Turkey;1. Department of Chemistry, College of Natural and Computational Sciences, Haramaya University, Oromia, Ethiopia;2. School of Water Resources and Environment, Research Center of Environmental Science and Engineering, China University of Geosciences (Beijing), 100083 Beijing, China;3. School of Plant Sciences, College of Agriculture and Environmental Sciences, Haramaya University, Oromia, Ethiopia;1. Deparment of Chemistry and Chemical Processing Technologies, Mersin University, 33343, Mersin, Turkey;2. Deparment of Chemistry and Chemical Processing Technologies, Dicle University, 21280, Diyarbak?r, Turkey;3. Food Processing Programme, Mersin University, 33343, Mersin, Turkey;4. Deparment of Chemistry and Chemical Processing Technologies, Siirt University, 56100, Siirt, Turkey;5. Chemistry Department, Sciences Faculty, Erciyes University, 38039, Kayseri, Turkey;6. Technology Research & Application Center (TAUM), Erciyes University, 38039, Kayseri, Turkey;1. National Centre for Compositional Characterization of Materials, Bhabha Atomic Research Centre, ECIL Post, Hyderabad 500 062, India;2. Homi Bhabha National Institute, Anushakti Nagar, Mumbai 400 094, India |
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| Abstract: | In this study, a novel poly (SMIm)-Tris-Fe3O4 nanocomposite was prepared for selective extraction of Cu+ and Cu2+ ions by ultrasound assisted-cloud point extraction (UA-CPE). The nanocomposite was characterized by analysis of ATR-FT-IR, 1H NMR and XRD. After optimization of the extraction conditions, the copper ions were independently detected against sample blank at 347 nm by micro-volume UV–vis spectrophotometer. Under the optimal conditions, good linear relationship was obtained in the ranges of 0.3?150 and 10?350 μg L?1 for each ion at pH 7.0 and pH 5.0, respectively, with a better regression coefficient than 0.992. The method detection limits, accuracy and precision were 0.095 and 3.03 μg L?1, 91.5?96.0 % and 93.0?98.5 %, and 2.5–4.5 and 3.8–7.1 % (n:5, 25 and 100 μg L?1) for Cu+ and Cu2+ ions, respectively. A preconcentration of 70-fold was obtained from 35-mL of sample. After validation, the method was successfully applied to determination of total Cu levels in lichen and mushroom samples after pre-reduction at pH 7.0, and the recoveries in the range of 90?96 % were obtained by two calibration approaches after spiking with 10 μg L?1. The results were also statistically compared with those obtained by FAAS analysis to ensure accuracy and precision. |
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| Keywords: | Copper Poly(styrene-alt-maleic anhydride) copolymer Tris Ultrasound assisted-cloud point extraction Food analysis Food composition Micro-volume UV–vis spectrophotometry |
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