Analytical Method of Multi-Mycotoxins in Table-Ready Foods for a Total Diet Study Using Stable Isotope Dilution Liquid Chromatography-Tandem Mass Spectrometry
Determining the multi-mycotoxins present in table-ready foods is necessary for a total diet study. However, so far, most methods of analyzing multi-mycotoxins apply to raw foods. Therefore, a reliable method for analyzing multi-mycotoxins in table-ready foods is needed. We developed and validated me...
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Published in | Journal of AOAC International Vol. 102; no. 6; pp. 1657 - 1665 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
England
01.11.2019
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Subjects | |
Online Access | Get full text |
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Summary: | Determining the multi-mycotoxins present in table-ready foods is necessary for a total diet study. However, so far, most methods of analyzing multi-mycotoxins apply to raw foods. Therefore, a reliable method for analyzing multi-mycotoxins in table-ready foods is needed.
We developed and validated methods of multi-mycotoxin analysis that employed stable isotope dilution with LC-tandem MS (LC-MS/MS) using two representative matrices.
Samples were fortified with [
C]-labeled mycotoxins as internal standards and extracted with 50% acetonitrile in water for high-carbohydrate foods and 3% formic acid in acetonitrile for high-protein and/or high-fat foods, cleaned up with
-hexane and the quick, easy, cheap, effective, rugged, and safe (QuEChERS) method, and followed up by LC-MS/MS.
Validation of the methods was performed, and the results were as follows: the correlation coefficient,
², was 0.99; method detection limit, 0.01-2.4 μg/kg; recoveries, 83.6-114%; precision, 0.8-10 (intraday) and 3.1-22% (interday); interlaboratory reproducibility, ≤15%; and uncertainty, 3.5-19%
. The applicability of the methods was evaluated by analyzing table-ready foods spiked with standards.
These methods were successfully evaluated and deemed appropriate for determining the multi-mycotoxins in table-ready foods.
This work demonstrates that stable isotope dilution with LC-MS/MS can be effectively used to analyze multi-mycotoxins simultaneously in a total diet study. |
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ISSN: | 1060-3271 1944-7922 |
DOI: | 10.1093/jaoac/102.6.1657 |