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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| Affiliation: | 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, Diyarbakır, 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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