期刊
FOOD CHEMISTRY
卷 192, 期 -, 页码 188-196出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2015.06.104
关键词
beta-Agonists; Animal body fluid and tissues; Identification; UHPLC-Q-Orbitrap HRMS; Spectra library
资金
- Special Fund for Agro Scientific Research in the Public Interest [201203088]
- National Natural Science Foundation of China [31170343]
Broad screening and identification of beta-agonists in feed, serum, urine, muscle and liver samples was achieved in a quick and highly sensitive manner using ultra high performance liquid chromatogra phy-quadrupole-orbitrap high resolution mass spectrometry (UHPLC-Q-Orbitrap HRMS) combined with a spectra library search. Solid-phase extraction technology was employed for sample purification and enrichment. After extraction and purification, the samples were analyzed using a Q-Orbitrap high-resolution mass spectrometer under full-scan and data-dependent MS/MS mode. The acquired mass spectra were compared with an in-house library (compound library and MS/MS mass spectral library) built with TraceFinder Software which contained the M/Z of the precursor ion, chemical formula, retention time, character fragment ions and the entire MS/MS spectra of 32 beta-agonist standards. Screening was achieved by comparing 5 key mass spectral results and positive matches were marked. Using the developed method, the identification results from 10 spiked samples and 238 actual samples indicated that only 2% of acquired mass spectra produced false identities. The method validation results showed that the limit of detection ranged from 0.021-3.854 mu g kg(-1) and 0.015-1.198 ng mL(-1) for solid and liquid samples, respectively. (C) 2015 Elsevier Ltd. All rights reserved.
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