期刊
JOURNAL OF CHROMATOGRAPHY A
卷 1609, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.chroma.2019.460520
关键词
Sulfonamides; Ultrasound-assisted extraction; Hydrophobic deep eutectic solvent; Liquid-liquid microextraction; Fruit juices
A sensitive, fast, eco-friendly ultrasound assisted liquid-liquid microextraction (LLME) in combination with hydrophobic deep eutectic solvent (DES) method was developed to preconcentrate and extract sulfonamides in fruit juices, prior to high-performance liquid chromatographic (HPLC) analysis. The DES was synthesized with trioctylmethylammonium chloride (TAC) and 2-octanol at the molar ratio of 1:2. Some parameters which affected the extraction efficiency were investigated and optimized, including the volume of DES, extraction method, extraction time, pH. Under the optimum conditions, good linearity (r = 0.9999) in the range of 0.1-50 mu g mL(-1) was obtained. The limit of detection (LOD) was 0.02-0.05 mu g mL(-1). And the accuracy of the developed method was confirmed by analysis of spike method, the recoveries were in the range of 88.09-97.84% at the spike levels of 2-20 mu g mL(-1) in fruit juices. (C) 2019 Elsevier B.V. All rights reserved.
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