Prediction of Total Phenolic Content in Extracts of Prunella Species from HPLC Profiles by Multivariate Calibration

Table 3

Total phenol content of standard phenolic compounds that were added in the acidic methanol extract of Prunella grandiflora by Folin method.

Phenolic compounds	Total phenol content; (μmol GAE)
Extract	0.285±0.001
Rosmarinic acid	0.294±0.001
Rutin	0.267±0.001
Quercetin	0.274±0.001
Caffeic acid	0.278±0.002
Kaempferol	0.274±0.003
Mixture	0.325±0.003
Mixture (without rosmarinic acid)	0.312±0.006
Mixture (without rutin)	0.328±0.001
Mixture (without quercetin)	0.330±0.003
Mixture (without caffeic acid)	0.331±0.007
Mixture (without kaempferol)	0.330±0.005

GAE: gallic acid equivalent.
Mean of two determinations ± SD (standard deviation).