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中文摘要：
以疏水性离子液体1－丁基－3－甲基咪唑六氟磷酸盐（[Bmim]PF6）替代挥发性有机溶剂萃取分离水中的四环素类抗生素，在pH值为6．5时，金属离子Al（Ⅲ）能与四环素类抗生素（TCs）形成稳定的配合物，[Bmim]PF6能够高效萃取该配合物，可用光度法直接测定，最大吸收波长为380nm，方法灵敏度高，TCs—Al（Ⅲ）配合物摩尔吸光系数达到1．38×10^6L／（mol·cm），一次萃取率达97．2％，分配系数达到174。实测某鱼塘水样，加标回收率在81．25％～93．66％之间，RSD≤4．25％，该方法可用于环境水样中四环素类抗生素残留的分析，简便、快速、无毒、无污染。
英文摘要：
As a substitute of traditional volatile organic solvent, the hydrophobic ionic liquid, 1- butyl-3-methylimidazolium hexafluorophosphate （ [ Bmim ] PF6 ） was used to extract tetracyclines antibiot- ics （TCs）. Aluminum ion and TCs form a stable complex at pH 6.5, and [ Bmim] PF6 can extract the complex effectively. In the ionic liquid phase, the complex has high absorbance with the maximum wave of 380 nm, the apparent molar absorptivity is 1.38 × 10^6 L/（ mol · cm）, the extraction yield can reach over 97.2% by one stage extraction, and the partition coefficient is 174. In actual determination of TCs in fish pond water sample, the recovery with standard addition is between 81.25% and 93.66%, and the relative standard deviation is equal to or less than 4.25%. This method is suitable for determining the trace TCs residue in water sample with the merits, such as simple and fast operation, non toxicity and non pollution.
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