Simultaneous Determination of Gallic Acid, Ellagic Acid, and Eugenol in Syzygium aromaticum and Verification of Chemical Antagonistic Effect by the Combination with Curcuma aromatica Using Regression Analysis
Table 3
Recovery of 3 reference compounds in the Syzygium aromaticum extract ().
Compound
Original concentration (g/mL)
Spiked concentration (g/mL)
Detected concentration (g/mL)
Recovery (%)
RSDa (%)
Gallic acid
17.76
5
22.80
102.16
2.56
10
27.39
96.37
1.44
20
37.99
101.03
0.97
Ellagic acid
16.27
5
21.41
102.81
0.13
10
25.49
92.19
1.66
15
30.61
95.62
2.36
Eugenol
37.72
10
48.08
103.24
0.64
25
62.24
97.98
0.33
40
76.34
96.51
0.11
Relative standard deviation (%) = (standard deviation/mean) 100.
