Column oven temperature program was: 50 °C (1.0 min), heating at 10 °C min-1 to 65 °C (0 min), heating at 25 °C min-1 to 180 °C (0 min) and at 5 °C min-1 until 280 °C, remaining at this temperature until 35 min. The soft warm-up at 10 °C min-1 from 1 to 2.5 min of runtime was the best condition to produce higher signal for the selected analytes in acetonitrile extracts.