Azoxystrobin residues in tomatoes and cucumbers was accurately determined by gas chromatography / mass spectrometry (GC-MS) in the selective ion monitoring (SIM) mode (the selected ion: m/z 344, 372, 388 and 403).The average recoveries at three levels came to range from 83.92% to 95.77% with a relative standard deviation of less than 20.0%.The limit of detection and the limit of quantitation were ...