Table 1 Linear regression of phenylpropanoic acids and 4-hydrocinnaldehydes for quantitative analysis
Compound | Retention time (min) | Regression equation | Linearity range (pmol) | Correlation coefficient (R 2) |
|---|---|---|---|---|
p-Coumaric acid | 27.16 | y = 56,836x – 34,958 | 40.93–13,641.90 | 0.9998 |
Caffeic acid | 12.41 | y = 107,373x + 2,2054 | 13.65–4,551.51 | 0.9998 |
Ferulic acid | 34.28 | y = 144,834x – 7,23452 | 11.43–3,810.90 | 0.9958 |
p-Coumaraldehyde | 37.32 | – | – | – |
Caffeldehyde | 23.42 | – | – | – |
Coniferaldehyde | 44.69 | y = 542,502x – 9,79192 | 3.70–1,234.64 | 0.9957 |
Sinapaldehyde | 47.53 | y = 330,008x – 3,86290 | 3.75–1,248.74 | 0.9986 |