Simplified Pesticide Multiresidue Analysis of Soybean Oil by Low-Temperature Cleanup and Dispersive Solid-Phase Extraction Coupled with Gas Chromatography/Mass Spectrometry

A simple, fast, and economical method has been developed for the simultaneous determination of 28 various types of pesticides in soybean oil. Pesticides of low molecular mass were separated from the fat of the oil, which has a high molecular mass, by using low-temperature fat precipitation, followed...

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Bibliographic Details
Published in:Journal of AOAC International 2007-09, Vol.90 (5), p.1387-1394
Main Authors: Li, L, Xu, Y, Pan, C, Zhou, Z, Jiang, S, Liu, F
Format: Article
Language:English
Subjects:
accuracy
Amines - chemistry
Biological and medical sciences
Chemistry Techniques, Analytical - methods
detection
Extraction (Chemistry)
Fat industries
Food
Food Analysis - methods
Food Contamination
Food industries
Fundamental and applied biological sciences. Psychology
Gas chromatography
Gas Chromatography-Mass Spectrometry - methods
Identification and classification
Ions
limit of quantitation
lipids
Mass spectrometry
Measurement
Methods
molecular weight
new methods
Octanols - chemistry
Pesticide residues
Pesticide Residues - analysis
Pesticide Residues - chemistry
Pesticides - analysis
Pesticides - chemistry
quantitative analysis
Reproducibility of Results
Solid Phase Extraction
Soy oil
soybean oil
Soybean Oil - chemistry
Temperature
Testing
Time Factors
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Summary:A simple, fast, and economical method has been developed for the simultaneous determination of 28 various types of pesticides in soybean oil. Pesticides of low molecular mass were separated from the fat of the oil, which has a high molecular mass, by using low-temperature fat precipitation, followed by a cleanup process based on dispersive solid-phase extraction with primary secondary amine and C18 as sorbents and magnesium sulfate for the removal of residual water. The results for all pesticides determined by gas chromatography with mass spectrometry in the selected-ion monitoring mode were linear, and the matrix effect of the method was evaluated. Recoveries of most pesticides were acceptable at fortification levels of 0.02, 0.05, 0.2, and 1 mg/kg. The relative standard deviation was
ISSN:1060-3271
1944-7922
DOI:10.1093/jaoac/90.5.1387