Table 1: Table of the characteristic sequences of neutral losses, from their corresponding precursor ions and characteristic low-mass product ions, for the four flavonoid classes analysed in this study.

Flavonoid classCharacteristic neutral lossesCharacteristic productions

Flavonols (1 and 2)−28, −44, −18151, 125, 107
Flavones (3 and 4)−28, −44, −44, −28, −42151, 121, 107
Flavanones (5 and 6)−18, −44, −44, −18, −42151, 125, 107
Flavanols (7 and 8)−18, −44, −44, −18, −42137, 125, 109