Analysis of 10 systemic pesticide residues in various baby foods using liquid chromatography-tandem mass spectrometry

ABSTRACT Ten systemic pesticides, comprising methomyl, thiamethoxam, acetamiprid, carbofuran, fosthiazate, metalaxyl, azoxystrobin, diethofencarb, propiconazole, and difenoconazole, were detected in 13 baby foods (cereals, boiled potatoes, fruit and milk) using QuEChERS (Quick, Easy, Cheap, Effective, Rugged and Safe) for sample preparation and liquid chromatography tandem mass spectrometry for analysis. The matrix‐matched calibration curves showed good linearity with determination coefficients (R2) > 0.992. The limits of detection and quantitation were 0.0015–0.003 and 0.005–0.01 mg/kg, respectively. The mean recoveries of three different concentrations ranged from 69.2 to 127.1% with relative standard deviations