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. 2020 Jan 6;2020:3945194. doi: 10.1155/2020/3945194

Table 3.

Retention time and calibration curves of standards (n = 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.