Table 6.
Calibration parameters for all the used analytical standards.
| Class | Standard | Calibration Curve Equation | R2 | Calibration Curve Range (mg L−1) |
|---|---|---|---|---|
| Cinnamic acids | caffeic acid | y = 59.046x + 200.6 | 0.996 | 111–500 |
| chlorogenic acid | y = 13.583x + 760.05 | 0.984 | 111–500 | |
| coumaric acid | y = 8.9342x + 217.4 | 0.997 | 111–500 | |
| ferulic acid | y = 3.3963x − 4.9524 | 1.000 | 111–500 | |
| Flavonols | hyperoside | y = 7.1322x − 4.583 | 0.999 | 111–500 |
| isoquercitrin | y = 8.3078x + 26.621 | 0.999 | 111–500 | |
| quercetin | y = 3.4095x − 98.307 | 0.998 | 111–500 | |
| quercitrin | y = 2.7413x + 5.6367 | 0.998 | 111–500 | |
| rutin | y = 6.5808x + 30.831 | 0.999 | 111–500 | |
| Benzoic acids | ellagic acid | y = 29.954x + 184.52 | 0.998 | 62.5–250 |
| gallic acid | y = 44.996x + 261.86 | 0.999 | 62.5–250 | |
| Catechins | catechin | y = 8.9197x + 66.952 | 1.000 | 62.5–250 |
| epicatechin | y = 12.88x − 43.816 | 0.999 | 62.5–250 | |
| Tannins | castalagin | y = 4.236x − 8.535 | 1.000 | 62.5–250 |
| vescalagin | y = 4.939x − 1.232 | 1.000 | 62.5–250 | |
| Monoterpenes | limonene | y = 0.1894x − 5.420 | 0.999 | 125–1000 |
| phellandrene | y = 8.783x − 145.3 | 0.998 | 125–1000 | |
| sabinene | y = 18.14x − 1004 | 0.998 | 125–1000 | |
| γ-terpinene | y = 0.4886x − 23.02 | 0.999 | 125–1000 | |
| terpinolene | y = 26.52x + 876.8 | 0.999 | 125–1000 | |
| Organic acids | citric acid | y = 1.0603x − 22.092 | 1.000 | 167–1000 |
| malic acid | y = 1.415x − 80.254 | 0.996 | 167–1000 | |
| oxalic acid | y = 6.4502x + 6.1503 | 0.998 | 167–1000 | |
| quinic acid | y = 0.8087x − 38.021 | 0.998 | 167–1000 | |
| succinic acid | y = 0.9236x − 8.0823 | 0.995 | 167–1000 | |
| tartaric acid | y = 1.8427x + 15.796 | 1.000 | 167–1000 | |
| Vitamins | ascorbic acid | y = 42.71x + 27.969 | 0.999 | 100–1000 |
| dehydroascorbic acid | y = 4.1628x + 140.01 | 0.999 | 30–300 | |
| Sugar | fructose | y = 1.8548x + 1.2324 | 0.999 | 125–1000 |
| glucose | y = 0.1269x − 0.1107 | 0.998 | 125–1000 | |
| sucrose | y = 0.296x − 3.2202 | 1.000 | 125–1000 |
Single bioactive molecules were identified and quantified using selected biomarkers with a positive role in human health (“multi-marker approach”) according to Mok and Chau [71]. All the results were expressed as mg/100 g of product (Pr), except sugars (expressed as g/100 g of Pr). Total bioactive compound content (TBCC) were determined as sum of selected compounds and expressed as mg/100 g of product.