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中文摘要：
将离子液体应用于气浮溶剂浮选，建立了一种分离/富集四环素类（tetracyclines, TCs）抗生素的新方法——离子液体气浮溶剂浮选。最优化浮选条件为：以1-己基-3-甲基咪唑六氟磷酸盐（[Hmim]PF6）和乙酸乙酯（EA）的混合溶剂（φ=1/0.9）为浮选剂，以Fe（Ⅲ）为捕集剂，pH值为7.6，气体流速为40 mL·min-1，浮选时间为50 min。富集TCs-Fe（Ⅲ）配合物的[Hmim]PF6-EA相用荧光光谱法直接测定，其线性回归方程为F=246.5c＋4.32（c： μg·10 mL-1），相关系数r=0.999 1。实测了鱼塘表面水体和沉积物中四环素类抗生素的含量，加标回收率达到94.2%～100.4%，RSD＜3.2%（n=5）。红外光谱分析显示TCs-Fe（Ⅲ）配合物没有和离子液体发生反应，离子液体在气浮溶剂浮选中只起到溶剂作用。该方法适合于环境水样中痕量四环素类抗生素的分离/富集及分析。
英文摘要：
It is the first time ionic liquid was applied to gas solvent sublation, which established a new method for separation/en- richment of tetracyclines（TCs） antibiotic based on ionic liquid gas solvent sublation. The optimizing experimental conditions were as follows., the mixture of ionic liquid 1-hexyl-3-methylimidazo lium hexafluorophosphats and ethyl acetate （[Hmim]PF6- EA, φ=1/0.9） can be used as flotation solvent, Fe（ Ⅲ ） ion was as trapping agent, pH of test solution was 7.6, the gas flow rate was 40 mL ~ rain ~, and the flotation time was 50 rain. The complexes of TCs- Fe （ Ⅲ ） were pre-eoneentrated in the Y-Hmim]PF6-EA layer and this was used to determine analytes by fluorescence method directly. The linear regression equation was F=246.5c＋4.32 （c： μg·10 mL-1 ）, and correlation coefficient was 0. 999 1. Recoveries between 94. 2% and 100. 4% were achieved from surface water and sediment samples in ponder by using this method and the relative standard deviation of 5 μg· mL-1 TCs for 5 parallel determinations was less than 3.2%. FTIR spectroscopy demonstrated that no chemical （bonding） in- teractions occurred between the ionic liquid and the complexes functional groups, and the ionic liquid was only solvent. The ex- perimental result indicated that utilizing ionic liquid to float TCs in environmental sample is feasible.
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