caa a22 4500 445802553 CHVBK 20180317145146.0 cr unu---uuuuu 170323e20110601xx s 000 0 eng 10.1007/s10337-011-1992-8 doi (NATIONALLICENCE)springer-10.1007/s10337-011-1992-8 Temperature-Induced Ionic Liquids Dispersive Liquid-Liquid Microextraction of Tetracycline Antibiotics in Environmental Water Samples Assisted by Complexation [Elektronische Daten] [Dekun Hou, Yan Guan, Xiaowei Di] In this study, dispersive liquid-liquid microextraction (DLLME) combined with ultra high pressure liquid chromatography (UHPLC)-tunable ultraviolet detection (TUV), was developed for pre-concentration and determination of trace levels of tetracyclines, including 4-epitetracycline, 4-epichlortetracycline, doxycycline, chlortetracycline oxytetracycline, tetracycline, 4-epianhydrotetracycline and anhydrotetracycline, in aqueous samples. La (III) was used as the chelating agent to form a hydrophobic complex compound with tetracyclines, followed by extraction with ionic liquids. Some important parameters that may affect extraction efficiencies were examined and optimized. Under the optimum conditions, linearity of the method was observed in the range of 0.1-200μgL−1, with correlation coefficients (r 2) >0.992. The limits of detection and quantification were 0.031-0.079 and 0.10-0.26μgL−1, respectively. The spiked recoveries of eight target compounds in river water, fishpond water and hog leachate were achieved in the range of 62.6-96.3, 58.9-94.5, 55.1-86.1%, respectively. Springer-Verlag, 2011 Column liquid chromatography nationallicence DLLME nationallicence Ionic liquid nationallicence Tetracyclines nationallicence Hou Dekun College of Chemistry and Chemical Engineering, Inner Mongolia University, No.235, Daxue Xi Road, 010021, Hohhot, Inner Mongolia, China aut Guan Yan College of Chemistry and Chemical Engineering, Inner Mongolia University, No.235, Daxue Xi Road, 010021, Hohhot, Inner Mongolia, China aut Di Xiaowei College of Chemistry and Chemical Engineering, Inner Mongolia University, No.235, Daxue Xi Road, 010021, Hohhot, Inner Mongolia, China aut Chromatographia Springer-Verlag 73/11-12(2011-06-01), 1057-1064 0009-5893 73:11-12<1057 2011 73 10337 https://doi.org/10.1007/s10337-011-1992-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10337-011-1992-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hou Dekun College of Chemistry and Chemical Engineering, Inner Mongolia University, No.235, Daxue Xi Road, 010021, Hohhot, Inner Mongolia, China aut NATIONALLICENCE 700 1- Guan Yan College of Chemistry and Chemical Engineering, Inner Mongolia University, No.235, Daxue Xi Road, 010021, Hohhot, Inner Mongolia, China aut NATIONALLICENCE 700 1- Di Xiaowei College of Chemistry and Chemical Engineering, Inner Mongolia University, No.235, Daxue Xi Road, 010021, Hohhot, Inner Mongolia, China aut NATIONALLICENCE 773 0- Chromatographia Springer-Verlag 73/11-12(2011-06-01), 1057-1064 0009-5893 73:11-12<1057 2011 73 10337 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer