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Title

Determination of lipophilic marine toxins in mussels. Quantification and confirmation criteria using high resolution mass spectrometry

AuthorsDomènech, Albert; Cortés, Nuria ; Palacios, Óscar; Franco, José M. ; Riobó, Pilar ; Llerena, José J.; Vichi, Stefania; Caixach Gamisans, Josep
KeywordsHigh resolution mass spectrometry
Lipophilic marine toxins
Identification and confirmation
Quantification
Validation method
Uncertainty
Issue Date2014
PublisherElsevier
CitationJournal of Cromatography A 1328: 16-25 (2014)
AbstractA multitoxin method has been developed for quantification and confirmation of lipophilic marine biotoxins in mussels by liquid chromatography coupled to high resolution mass spectrometry (HRMS), using an Orbitrap-Exactive HCD mass spectrometer. Okadaic acid (OA), yessotoxin, azaspiracid-1, gymnodimine, 13-desmethyl spirolide C, pectenotoxin-2 and Brevetoxin B were analyzed as representative compounds of each lipophilic toxin group. HRMS identification and confirmation criteria were established. Fragment and isotope ions and ion ratios were studied and evaluated for confirmation purpose. In depth characterization of full scan and fragmentation spectrum of the main toxins were carried out. Accuracy (trueness and precision), linearity, calibration curve check, limit of quantification (LOQ) and specificity were the parameters established for the method validation. The validation was performed at 0.5 times the current European Union permitted levels. The method performed very well for the parameters investigated. The trueness, expressed as recovery, ranged from 80% to 94%, the precision, expressed as intralaboratory reproducibility, ranged from 5% to 22% and the LOQs range from 0.9 to 4.8 pg on column. Uncertainty of the method was also estimated for OA, using a certified reference material. A top-down approach considering two main contributions: those arising from the trueness studies and those coming from the precision's determination, was used. An overall expanded uncertainty of 38% was obtained
Description10 páginas, 5 tablas, 3 figuras
Publisher version (URL)http://dx.doi.org/10.1016/j.chroma.2013.12.071
URIhttp://hdl.handle.net/10261/103041
DOI10.1016/j.chroma.2013.12.071
ISSN0021-9673
E-ISSN1873-3778
Appears in Collections:(IDAEA) Artículos
(IIM) Artículos
(CID) Artículos
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