Xiaojia Huang,

Yulei Wang, Yi Liu, Dongxing Yuan.Journal of Separation Science,2013.

36: 3210–3219

Nanosized

spherical magnetic poly(vinylimidazole-co-divinylbenzene) particles were

synthesizedand used as a sorbent for the enrichment of trace fluoroquinolones

(FQs) fromenvironmental water samples. A suspension polymerization procedure

was used to preparethe sorbent. The magnetic sorbent was characterized by SEM,

transmission electronmicroscopy, elemental analysis, and FTIR spectroscopy.

Analysis of enrofloxacin, marbofloxacin,fleroxacin, lomefloxacin, and

sparfloxacin in environmental water samples bythe combination of the magnetic

sorbent and HPLC with diode array detection was selectedas a paradigm for the practical

application of the new adsorbent. Several extractionconditions, including

desorption solvent, extraction and desorption time, pH value, andionic strength

in sample matrix, were optimized. Results showed that the new sorbent hadhigh

affinity for FQs and could be used to extract them effectively. Under the

optimumconditions, low detection (S/N = 3) and quantification (S/N = 10) limits

were achieved forthe target analytes, within the ranges of 0.20–1.46 and

0.68–4.84 _g/L, respectively. Methodrepeatability was achieved in terms of

intra- and interday precisions, indicated by the RSDs,which were both

<10 .0%. the method also showed good linearity, simplicity, practicality,and

environmental friendliness for the extraction of FQs. Finally, the developed method

wassuccessfully applied to the determination of FQs in lake water, surface

water, and reservoirwater samples. Acceptable recoveries of spiked target

compounds in these water sampleswere in the range of 52.1–104.5%.

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