PMID- 25577068 OWN - NLM STAT- MEDLINE DCOM- 20150820 LR - 20220317 IS - 1873-7072 (Electronic) IS - 0308-8146 (Linking) VI - 175 DP - 2015 May 15 TI - Optimization of a phase separation based magnetic-stirring salt-induced liquid-liquid microextraction method for determination of fluoroquinolones in food. PG - 181-8 LID - S0308-8146(14)01870-6 [pii] LID - 10.1016/j.foodchem.2014.11.132 [doi] AB - Herein, we developed a novel integrated apparatus to perform phase separation based on magnetic-stirring, salt-induced, liquid-liquid microextraction for determination of five fluoroquinolones in animal-based foods by HPLC analysis. The novel integrated apparatus consisted of three simple HDPE (high density polyethylene) parts that were used to separate the solvent from the aqueous solution prior to retrieving the extractant. The extraction parameters were optimized using the response surface method based on central composite design: 791 muL of acetone solvent, 2.5 g of Na2SO4, pH 1.7, 3.0 min of stir time, and 5.5 min centrifugation. The limits of detection were 0.07-0.53 mug kg(-1) and recoveries were 91.6-105.0% for the five fluoroquinolones from milk, eggs and honey. This method is easily constructed from inexpensive materials, extraction efficiency is high, and the approach is compatible with HPLC analysis. Thus, it has excellent prospects for sample pre-treatment and analysis of fluoroquinolones in animal-based foods. CI - Copyright (c) 2014 Elsevier Ltd. All rights reserved. FAU - Gao, Ming AU - Gao M AD - College of Environmental Sciences and Public Health, Wenzhou Medical University, Wenzhou 325035, China. FAU - Wang, Huili AU - Wang H AD - College of Environmental Sciences and Public Health, Wenzhou Medical University, Wenzhou 325035, China. Electronic address: whuili@163.com. FAU - Ma, Meiping AU - Ma M AD - College of Environmental Sciences and Public Health, Wenzhou Medical University, Wenzhou 325035, China. FAU - Zhang, Yuna AU - Zhang Y AD - College of Environmental Sciences and Public Health, Wenzhou Medical University, Wenzhou 325035, China. FAU - Yin, Xiaohan AU - Yin X AD - College of Environmental Sciences and Public Health, Wenzhou Medical University, Wenzhou 325035, China. FAU - Dahlgren, Randy A AU - Dahlgren RA AD - Department of Land, Air and Water Resources, University of California, Davis, CA 95616, USA. FAU - Du, Dongli AU - Du D AD - College of Environmental Sciences and Public Health, Wenzhou Medical University, Wenzhou 325035, China. FAU - Wang, Xuedong AU - Wang X AD - College of Environmental Sciences and Public Health, Wenzhou Medical University, Wenzhou 325035, China. Electronic address: wxdong@wzmc.edu.cn. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20141129 PL - England TA - Food Chem JT - Food chemistry JID - 7702639 RN - 0 (Fluoroquinolones) RN - 0 (Solutions) RN - 0 (Solvents) RN - 0 (Sulfates) RN - 0YPR65R21J (sodium sulfate) RN - 1364PS73AF (Acetone) SB - IM MH - Acetone/isolation & purification MH - Animals MH - Chromatography, High Pressure Liquid/methods MH - Eggs/analysis MH - Fluoroquinolones/*analysis MH - Food Analysis/*methods MH - Honey/analysis MH - Liquid Phase Microextraction/*methods MH - Magnetic Phenomena MH - Milk/chemistry MH - Solutions/chemistry MH - Solvents/isolation & purification MH - Sulfates OTO - NOTNLM OT - Animal-based food OT - Central composite design OT - Combining apparatus OT - Fluoroquinolones OT - Magnetic-stirring salt-induced liquid-liquid microextraction OT - Phase separation prior to collection EDAT- 2015/01/13 06:00 MHDA- 2015/08/21 06:00 CRDT- 2015/01/12 06:00 PHST- 2014/03/21 00:00 [received] PHST- 2014/07/27 00:00 [revised] PHST- 2014/11/23 00:00 [accepted] PHST- 2015/01/12 06:00 [entrez] PHST- 2015/01/13 06:00 [pubmed] PHST- 2015/08/21 06:00 [medline] AID - S0308-8146(14)01870-6 [pii] AID - 10.1016/j.foodchem.2014.11.132 [doi] PST - ppublish SO - Food Chem. 2015 May 15;175:181-8. doi: 10.1016/j.foodchem.2014.11.132. Epub 2014 Nov 29.