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- W2019018800 abstract "An ethyl acetate-assisted ionic liquid dispersive liquid–liquid microextraction method was developed for the determination of tetracyclines in water samples with high-performance liquid chromatography using a variable wavelength detector. A mixture of ethyl acetate and 1-butyl-3-methylimidazolium hexafluorophosphate was used to isolate lanthanum(III) chelates of tetracyclines. The addition of ethyl acetate significantly enhanced the extraction efficiencies. Experimental parameters affecting the efficiency such as the identity and volume of ionic liquid, the volume of ethyl acetate, chelating time, centrifuge time, pH, and ionic strength were evaluated. Under the optimum conditions, the calibration curves were linear and the correlation coefficients (r 2 ) ranged from 0.9985 to 0.9992 over concentration levels of 0.01–0.50 µg mL−1. The limits of detection (signal-to-noise ratio = 3) of the method ranged from 0.97 to 1.14 ng mL−1, whereas inter- and intra-day relative standard deviations (n = 5) were between 2.4–4.3% and 3.6–6.8%, respectively. This method was used to analyze water samples and recoveries from 62.6% to 109.6% were obtained." @default.
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- W2019018800 date "2014-06-26" @default.
- W2019018800 modified "2023-09-24" @default.
- W2019018800 title "Determination of Tetracyclines in Water by Ethyl Acetate–Ionic Liquid Dispersive Liquid–Liquid Microextraction and High-Performance Liquid Chromatography" @default.
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- W2019018800 doi "https://doi.org/10.1080/00032719.2014.883519" @default.
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