期刊
FOOD CHEMISTRY
卷 197, 期 -, 页码 907-915出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2015.11.070
关键词
Food supplement; Green tea; Royal jelly; Pesticides; Mycotoxins; UHPLC-Exactive-Orbitrap
资金
- FEDER [CTQ2012-34304]
- University Research Plan (Almeria University)
- Cajamar
- Mexican Senate
A multi-class methodology was developed to determine pesticides and mycotoxins in food supplements. The extraction was performed using acetonitrile acidified with formic acid (1%, v/v). Different clean-up sorbents were tested, and the best results were obtained using C-18 and zirconium oxide for green tea and royal jelly, respectively. The compounds were determined using ultra high performance liquid chromatography (UHPLC) coupled to Exactive-Orbitrap high resolution mass spectrometry (HRMS). The recovery rates obtained were between 70% and 120% for most of the compounds studied with a relative standard deviation < 25%, at three different concentration levels. The calculated limits of quantification (LOQ) were < 10 mu g/kg. The method was applied to green tea (10) and royal jelly (8) samples. Nine (eight of green tea and one of royal jelly) samples were found to be positive for pesticides at concentrations ranging from 10.6 (cinosulfuron) to 47.9 mu g/kg (paclobutrazol). The aflatoxin B1 (5.4 mu g/kg) was also found in one of the green tea samples. (C) 2015 Elsevier Ltd. All rights reserved.
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