Abstract
A method for simultaneous determination of ten pyrethroid insecticides residues in edible mushrooms was developed. The samples were pretreated by a quick, easy, cheap, effective, rugged (QuEChERS) method. The ten pyrethroid insecticides were extracted from six kinds of edible mushrooms using acetonitrile and subsequently cleaned up by octadecylsilane (C18) or primary secondary amine (PSA). Instrumental analysis was completed in 16 min using gas chromatography-tandem mass spectrometry (GC-MS/MS). The overall average recoveries in the six kinds of edible mushrooms at three levels (10, 100 and 1000 μg kg−1) ranged from 72.8% to 103.6%. The intraday and interday relative standard deviations (RSD) were lower than 13.0%. The quantification limits were below 5.57 μg kg−1 in different matrices. The results demonstrated that the method is convenient for the quick detection of pyrethroid insecticides in edible mushrooms.
Highlights
A method for simultaneous determination of ten pyrethroid insecticides residues in edible mushrooms was developed
A solid-liquid extraction followed by purification is a preliminary sample preparation for the determination of pesticide residues in edible mushrooms
GC-MS/MS is becoming more and more popular in routine pesticide residue analysis because of fewer co-matrix effects resulting in sensitive identification and the reagents costing less compared with HPLC/UPLC-MS/MS32
Summary
A method for simultaneous determination of ten pyrethroid insecticides residues in edible mushrooms was developed. Due to co-extraction of highly complex components, such as protein, sterols, essential amino acids, and polysaccharide, extracting pyrethroids residues from edible mushrooms is difficult[2]. The purification techniques, including solid-phase extraction (SPE), gel permeation chromatography (GPC), and matrix solid-phase dispersion, are the most commonly used techniques for pretreatment procedures[18,19,20] These sample preparation methods are complicated and use larger amounts of organic solvents[21,22]. The QuEChERS methodology has been develpoed as a very popular method to determine pesticide residues in all kinds of food matrices[23,24,25,26,27,28,29]. GC-MS/MS is becoming more and more popular in routine pesticide residue analysis because of fewer co-matrix effects resulting in sensitive identification and the reagents costing less compared with HPLC/UPLC-MS/MS32
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