Journal
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
Volume 93, Issue 14, Pages 1500-1512Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/03067319.2013.763250
Keywords
ionophores; pharmaceuticals; anticoccidials; antibiotics; SPE; LC-MS; MS
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Funding
- Danish Medicines Agency
- Drug Research Academy (University of Copenhagen)
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A multi-residue analytical methodology has been established for the determination of the four ionophores: lasalocid, monensin, salinomycin and narasin in aqueous environmental matrices, using nigericin as internal standard. The samples were filtrated prior to solid phase extraction. All compounds were measured using liquid chromatography coupled to tandem mass spectrometry applying electro spray ionisation. The absolute recoveries ranged from 92 to 110% (relative standard deviation: 2-14%) for spiked river water. The final method allowed for detection of ionophores down to a few ng/L in natural water bodies with LOQs for the entire methodology being 40, 49, 67, and 14ng/L for lasalocid, monensin, salinomycin, and narasin, respectively.
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