GAS-CHROMATOGRAPHY MASS-SPECTROMETRY OF FLAVONOID AGLYCONES .2. STRUCTURE-RETENTION RELATIONSHIPS AND A POSSIBILITY OF DIFFERENTIATION BETWEEN ISOMERIC 6-METHOXYFLAVONE AND 8-METHOXYFLAVONE

Gas chromatographic analysis of 51 flavonoid aglycones allowed a quant ification of structural influences on retention time. Well-reproducibl e structure-retention increments were calculated. These can be valuabl e for the analysis of complex flavonoid mixtures in plant extracts. In addition to the results published in Part I, gas chromatographic beha viour and mass spectrometric fragmentation of 8-methoxylated flavonoid aglycones have been studied.