Table 3: Comparison of intensities of the qualifier ion(s) for chlorogenic acid (m/z 85) and caffeic acid (m/z 89, 135) obtained for the standard and raw herb.

Analytem/z ion (relative intensity (%)a)Relative diff. (%)bPermitted tolerances
StandardRaw herb

Chlorogenic acid85 (7)85 (6)14c±50%

Caffeic acid89 (61)89 (50)18c±20%
135 (39)135 (33)15c±25%

aAverage calculated from 5 replicates.
bRelative difference (absolute difference/relative intensity of standard) × 100.
cMaximum permitted tolerance of the European Union guidelines [11].