Abstract：
:Liquid chromatography (LC)-Orbitrap mass spectrometry (MS) and LC-time-of-flight (TOF) MS operating in full scan mode at a mass resolution of 140,000 (m/z 200) and 30,000 (m/z 556), respectively, were compared for quantification of pesticide residues in tea. Both methods were validated for 146 pesticides at spike levels of 0.1 and 0.01 mg/kg and compared in terms of recovery, intra- and inter-day precisions, selectivity, linearity, and matrix effect. The results of both analyses were comparable, and recovery and intra- and inter-day precisions were within the acceptable ranges for most pesticides. LC-Orbitrap MS was slightly superior to LC-TOF MS in terms of sensitivity and selectivity due to its higher resolution. However, even using high-resolution LC-Orbitrap MS with a narrow mass window of ±3 ppm, interference by coeluting matrix components was observed, indicating that full scan data are insufficient for unequivocal identification, and additional information such as fragment ions is necessary.
journal_name
Food Chemjournal_title
Food chemistryauthors
Saito-Shida S,Hamasaka T,Nemoto S,Akiyama Hdoi
10.1016/j.foodchem.2018.02.123subject
Has Abstractpub_date
2018-08-01 00:00:00pages
140-148eissn
0308-8146issn
1873-7072pii
S0308-8146(18)30371-6journal_volume
256pub_type
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