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Determination of fluoroquinolones in bovine milk samples using a pipette-tip SPE step based on multiwalled carbon nanotubes prior to CE separation
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Applied Physical Chemistry.
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Applied Physical Chemistry.ORCID iD: 0000-0003-3548-217X
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Applied Physical Chemistry.
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2014 (English)In: Journal of Separation Science, ISSN 1615-9306, E-ISSN 1615-9314, Vol. 37, no 1-2, 158-164 p.Article in journal (Refereed) Published
Abstract [en]

A simple CE-UV method was developed for the simultaneous determination of ciprofloxacin, norfloxacin, and ofloxacin in milk samples. The optimum separation was obtained using a 20 mM ammonium dihydrogenphosphate solution with 2 mM cetyltrimethylammonium bromide at pH 3.0 as the BGE. Satisfactory resolution for structurally very similar analytes, like norfloxacin and ciprofloxacin, was achieved without including any organic solvent. Milk samples were prepared using a simple/extraction procedure based on acidic protein precipitation followed by an SPE step using only 5 mg of multiwalled carbon nanotubes as the sorbent material. The LODs for the three compounds were between 7.5 and 11.6 g/L and the RSDs for the peak areas were between 2.6 and 4.9%. The complete method was applied to spiked real milk samples with satisfactory recoveries for all analytes (84-106%).

Place, publisher, year, edition, pages
2014. Vol. 37, no 1-2, 158-164 p.
Keyword [en]
CE, Fluoroquinolones, Multiwalled carbon nanotubes, SPE
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URN: urn:nbn:se:kth:diva-140664DOI: 10.1002/jssc.201300980ISI: 000329478100023OAI: oai:DiVA.org:kth-140664DiVA: diva2:692451
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QC 20140131

Available from: 2014-01-31 Created: 2014-01-30 Last updated: 2017-12-06Bibliographically approved

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Jacksén, JohanEmmer, Åsa

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