Journal
FOODS
Volume 10, Issue 7, Pages -Publisher
MDPI
DOI: 10.3390/foods10071651
Keywords
GC-Orbitrap/MS; m-PFC; pesticide residues; rapid screening; vegetable and fruit juices
Categories
Funding
- National Key Research and Development Program of China [2018YFC1603400]
- State Administration for Market Regulation Special Technical Support Program [2019YJ009]
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A new method for screening pesticide residues in vegetable and fruit juices using m-PFC combined with GC-Orbitrap/MS has been developed, which effectively eliminates matrix interference, has a wide linear range, low detection limits, and stable recovery rates.
A new method for screening pesticide residues in vegetable and fruit juices by the multi-plug filtration cleanup (m-PFC) method combined with gas chromatography-electrostatic field orbitrap high resolution mass spectrometry(GC-Orbitrap/MS) was developed. The samples were extracted with acetonitrile, purified with m-PFC and determined by GC-Orbitrap/MS. Qualitative analysis was confirmed by retention time, accurate molecular mass and quantitative analysis were performed with the matrix standard calibration. It could eliminate matrix interference effectively. Eight kinds of typical samples (orange juice, apple juice, grape juice, strawberry juice, celery juice, carrot juice, cucumber juice, tomato juice) were evaluated. The linear ranges of the 350 pesticides were from 5 to 500 mu g/kg, with good correlation coefficients greater than 0.990. The limits of detection (LODs) were 0.3-3.0 mu g/kg and the limits of quantification (LOQs) were 1.0-10.0 mu g/kg. The average recoveries at three spiked levels of 10, 100, 200 mu g/kg were in the range of 72.8-122.4%, with relative standard deviations (RSDs) of 2.0-10.8%. The method has effectively improved the determination efficiency of pesticide residue screening by high-resolution mass spectrometry in vegetable and fruit juices.
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