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380 nm,方法灵敏度高,TCs-Al(Ⅲ)配合物摩尔吸光系数达到1.38×106 L/(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。
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.
出处
《中国给水排水》
CAS
CSCD
北大核心
2010年第8期90-92,97,共4页
China Water & Wastewater
基金
国家自然科学基金资助项目(20777029)
吉林省教育厅基金资助项目(20070156)
关键词
疏水性离子液体
萃取
四环素类抗生素
分光光度法
hydrophobic ionic liquid
extraction
tetracycline antibiotics
spectrophotometry
