Determination of acetamiprid, imidacloprid, and spirotetramat and their relevant metabolites in pistachio using modified QuEChERS combined with liquid chromatography-tandem mass spectrometry.
A QuEChERS based methodology was developed for the simultaneous identification and quantification of acetamiprid, imidacloprid, and spirotetramat and their relevant metabolites in pistachio by liquid chromatography-tandem mass spectrometry for the first time. First, sample extraction was done with MeCN:citrate buffer:NaHCO3 followed by phase separation with the addition of MgSO4:NaCl. The supernatant was then cleaned by a primary-secondary amine (PSA), GCB, and MgSO4. The proposed method provides a linearity in the range of 5-200µgL-1, and the linear regression coefficients were higher than 0.99. LOD and LOQ were obtained to be 2 and 5µgkg-1 for the studied insecticides, respectively, with the exception of imidacloprid-olefin (5 and 10µgkg-1). Acceptable recoveries (91-110%) were obtained for all the analytes with good intra- and inter-precisions (0.4≥RSD ≤11.0). The method was then used for the pistachio samples collected from a field trial to estimate the maximum residue limits (MRLs) in next step.
['Faraji|Mohammad|M|', 'Noorbakhsh|Roya|R|', 'Shafieyan|Hooshang|H|', 'Ramezani|Mohammadkazem|M|']
D001372:Aza Compounds D002851:Chromatography, High Pressure Liquid D000073943:Neonicotinoids D009574:Nitro Compounds D027927:Pistacia D013141:Spiro Compounds D053719:Tandem Mass Spectrometry
Acetamiprid Imidacloprid Spirotetramat Pistachio QuEChERS High-performance liquid chromatography-tandem mass spectrometry