Hollow‐fiber liquid‐phase microextraction for the direct determination of flumequine in urban wastewaters by flow‐injection analysis with terbium‐sensitized chemiluminescence

A flow‐injection analysis chemiluminescence method based on the enhancement effect of the flumequine‐Tb(III) complex on the weak native emission of the Ce(IV)‐Na₂SO₃ system has been developed for the determination of flumequine. The method includes a cleanup and preconcentration stage (750‐fold) of...

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Bibliographic Details
Published in:Journal of separation science 2014-10, Vol.37 (19), p.2738-2744
Main Authors: Ocaña‐González, Juan Antonio, Ramos‐Payán, María, Fernández‐Torres, Rut, Callejón‐Mochón, Manuel, Bello‐López, Miguel Ángel
Format: Article
Language:English
Subjects:
Applied sciences
Chemiluminescence
Cleaning
drug residues
Emission analysis
Exact sciences and technology
Extraction
Flow injection
Flow Injection Analysis
Flumequine
Fluoroquinolones - analysis
high performance liquid chromatography
Hollow fibers
Hydrogen-Ion Concentration
Instrumentation
Liquid Phase Microextraction
Luminescent Measurements
microextraction
Molecular Structure
Other wastewaters
Pollution
Polypropylenes
Porosity
Streams
Surface Properties
Terbium - chemistry
Urban areas
Waste water
Waste Water - chemistry
Wastewater
Wastewaters
Water Pollutants, Chemical - analysis
Water treatment
Water treatment and pollution
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Description
Summary:A flow‐injection analysis chemiluminescence method based on the enhancement effect of the flumequine‐Tb(III) complex on the weak native emission of the Ce(IV)‐Na₂SO₃ system has been developed for the determination of flumequine. The method includes a cleanup and preconcentration stage (750‐fold) of the sample by hollow‐fiber liquid‐phase microextraction using an Accurel® Q 3/2 polypropylene hollow fiber impregnated with 1‐octanol as the supported liquid membrane. The obtained 50 μL acceptor phase was injected in a 1 mM Tb(III) + 4 mM Ce(IV) in 5% v/v H₂SO₄ stream and mixed with a 2 mM Na₂SO₃ stream before its introduction into the flow cell. The chemiluminescence signal was linear in the 0.3–15 ng/mL range, with detection and quantitation limits of 0.1 and 0.3 ng/mL, respectively. The method allows the selective extraction and determination of flumequine in wastewater samples, using simpler and lower‐cost instrumentation and with shorter extraction and analysis times than traditional high‐performance liquid chromatography analysis.
ISSN:1615-9306
1615-9314
DOI:10.1002/jssc.201400383