Table 3.
Number | Phenolic compounds | Rta (min) | R2b | Calibration curvec (Y = aX + b) |
---|---|---|---|---|
1 | Homogentisic acid | 5.07 | 1.00 | Y = 15266X − 261028 |
2 | Gallic acid | 6.37 | 0.99 | Y = 12344X − 257389 |
3 | Protocatechnic acid | 7.67 | 1.00 | Y = 17658X − 339681 |
4 | Chlorogenic acid | 10.16 | 1.00 | Y = 21148X − 461992 |
5 | (+)-Catechin | 10.26 | 1.00 | Y = 3427.1X − 41775 |
6 | Caffeic acid | 12.49 | 1.00 | Y = 45912X − 904096 |
7 | Phloretic acid | 15.58 | 0.99 | Y = 6986.6X − 173117 |
8 | p-Coumaric acid | 16.95 | 1.00 | Y = 109086X − 2095025 |
9 | Ferulic acid | 18.92 | 1.00 | Y = 52036X − 996550 |
10 | Veratric acid | 19.76 | 1.00 | Y = 12550X − 234385 |
11 | Salicylic acid | 21.13 | 1.00 | Y = 5350X − 102288 |
12 | Naringin | 22.25 | 0.99 | Y = 11740X − 158668 |
13 | Hesperidin | 23.12 | 1.00 | Y = 3197X − 57859 |
14 | Quercetin | 30.61 | 1.00 | Y = 11756X − 257156 |
15 | Cinnamic acid | 31.90 | 1.00 | Y = 112897S − 2E + 06 |
16 | Naringenin | 33.88 | 0.99 | Y = 47325X − 691049 |
17 | Kaempferol | 34.69 | 1.00 | Y = 27333X − 605965 |
18 | Hesperitin | 34.97 | 0.99 | Y = 31446X − 426773 |
aRt: retention time; bcorrelation coefficients for three data points in the calibration curve; cwhere the Y and X are the peak area and concentration of the analyses (μg/mL), respectively.