title: [Studies on TCs-Fe(III) system separation/enrichment of trace tetracyclines antibiotic by combination ionic liquid [Hmim]PF6 solvent sublation with fluorescence spectroscopy determination].
abstract: It is the first time ionic liquid was applied to gas solvent sublation, which established a new method for separation/enrichment 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, phi = 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 x min(-1), and the flotation time was 50 min. The complexes of TCs- Fe (III) were pre-concentrated in the [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: microg x 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 microg x mL(-1) TCs for 5 parallel determinations was less than 3.2%. FTIR spectroscopy demonstrated that no chemical (bonding) interactions occurred between the ionic liquid and the complexes functional groups, and the ionic liquid was only solvent. The experimental result indicated that utilizing ionic liquid to float TCs in environmental sample is feasible.
authors.affiliation: College of Chemistry, Jilin Normal University, Siping 136000, China. wangliang7469@yahoo.com.cn
authors.forename: Liang
authors.initials: L
authors.lastname: Wang
authors.forename: Yong-Sheng
authors.initials: YS
authors.lastname: Yan
authors.forename: Hua-Ming
authors.initials: HM
authors.lastname: Li
authors.forename: Han-Wen
authors.initials: HW
authors.lastname: Sun
mesh_terms: D000900:Anti-Bacterial Agents / Q000737:chemistry; D004350:Drug Residues / Q000737:chemistry*; D004784:Environmental Monitoring; D005290:Ferric Compounds; D052578:Ionic Liquids; D007477:Ions; D012997:Solvents; D013050:Spectrometry, Fluorescence; D013754:Tetracyclines / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D000900:Anti-Bacterial Agents; D005290:Ferric Compounds; D052578:Ionic Liquids; D007477:Ions; D012997:Solvents; D013754:Tetracyclines; D014874:Water Pollutants, Chemical