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• W2929731790 startingPage "2092" @default.
• W2929731790 abstract "Novel and fast deep eutectic solvent (DES)-based homogeneous liquid–liquid microextraction (HLLME) was applied for the extraction of copper from vegetable samples followed by flame atomic absorption spectrometry (FAAS). 1,5-diphenyl carbazone (DPC) was used as the chelating agent, and a DES was used as the extraction media. The utilized DES was based on benzyl triphenyl phosphonium bromide and ethylene glycol in a 1:8 mole ratio. The phase separation phenomenon was occurred by changing of sample temperature. Several factors influencing the extraction efficiency were investigated and optimized. Under the optimized conditions, an enhancement factor of 64 was obtained. The limit of detection, based on three signal-to-noise ratio, and limit of quantification were found to be 0.13 µg L−1 and 5.0 µg L−1, respectively. The calibration curve was linear within the range of 5.0–250 µg L−1 with r2 > 0.9957. Intra- and inter-day relative standard deviations (%) of 2.1% and 2.6% were obtained at the concentration of 25 µg L−1. The accuracy of the proposed method was evaluated by analyzing a tomato leaves certified reference material and the results were to be in agreement with the certified value. Finally, the feasibility of the method was successfully confirmed by determination of copper in spinach, lettuce, broccoli, potato, carrot and parsley samples." @default.
• W2929731790 created "2019-04-11" @default.
• W2929731790 creator A5054878627 @default.
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• W2929731790 date "2019-04-02" @default.
• W2929731790 modified "2023-09-24" @default.
• W2929731790 title "Novel and Rapid Deep Eutectic Solvent (DES) Homogeneous Liquid–Liquid Microextraction (HLLME) with Flame Atomic Absorption Spectrometry (FAAS) Detection for the Determination of Copper in Vegetables" @default.
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• W2929731790 doi "https://doi.org/10.1080/00032719.2019.1598425" @default.
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