The TFC of the extracts are reported in Table 1. The TFCs can
be grouped into four levels. The first and the highest level
(29.34e31.11 mg QCE/g DFLA) with the highest value belongs
to the 100% ethanol extract (31.11 mg QCE/g DFLA), followed
by the 100% acetone extract (30.86 mg QCE/g DFLA) and the
75% aqueous acetone extract (29.36 mg QCE/g DFLA). The
second level (19.22e22.51 mg QCE/g DFLA) includes the 75%
aqueous methanol extract (22.51 mg QCE/g DFLA), the 75%
aqueous ethanol extract (19.47 mg QCE/g DFLA), and the 50%
aqueous acetone extract (19.22 mg QCE/g DFLA). The third
level (11.11e17.19 mg QCE/g DFLA) includes the 50% aqueous
ethanol (17.19 mg QCE/g DFLA), the 100% methanol extract
(15.42 mg QCE/g DFLA), and the 50% aqueous extract
(11.11 mg QCE/g DFLA). The final level with the lowest TFC, is
the water extract (4.04 mg QCE/g DFLA). It was observed that
the effect of solvents on TFC is similar to that on TPC. The
highest TFC was obtained in the 100% ethanol extract, followed
by the 100% acetone extract, the 100% methanol
extract, and the water extract. A similar trend was observed
in the amount of TPC. As the concentration of water in
ethanol or acetone increases, the TFC in the extract decreases.
By contrast, the TFC in the 75% aqueous methanol
extract is higher than that in the 100% methanol extract and
the 50% aqueous methanol extract.
A correlation analysis was performed on polyphenolic