Table 2.
Equations & R2 values of DPPH• assay and ABTS•+ graph results.
| Compounds | Equations & R2 Values |
|||
|---|---|---|---|---|
| DPPH• | ABTS•+ 5 min | ABTS•+ 10 min | ABTS•+ 15 min | |
| Hydroxybenzoic acids | ||||
| 2,3-dihydroxy benzoic acid | y = 22,533ln(x) - 26,306 | y = 8,9558x +8,7673 | y = 8,6252x + 15,39 | y = 8,4199x +18,153 |
| R2 = 0,8659 | R2 = 0,9008 | R2 = 0,7942 | R2 = 0,7619 | |
| 2,4-dihydroxy benzoic acid | y = 0,0269ln(x) - 0,3024 | y = -0,8579x+73,638 | y = -0,5726x+77,738 | y = -0,3502x + 80,067 |
| R2 = 0,0019 | R2 = 0,3816 | R2 = 0,2306 | R2 = 0,1097 | |
| 2,6-dihydroxy benzoic acid | y = -0,523ln(x) + 4,202 | y = 3,1351x +12,142 | y = 4,5313x +15,951 | y = 5,1916x +19,392 |
| R2 = 0,0764 | R2 = 0,9708 | R2 = 0,9364 | R2 = 0,9052 | |
| 3,4-dihydroxy benzoic acid | y = 27,667ln(x) - 56,829 | y = 5,5105x +2,3052 | y = 6,7069x +0,9442 | y = 7,0178x +1,2695 |
| R2 = 0,9727 | R2 = 0,996 | R2 = 0,9993 | R2 = 0,9985 | |
| 3,5-dihydroxy benzoic acid | y = 7,2191ln(x) - 27,642 | y = 7,3649x +28,846 | y = 7,2007x +30,407 | y = 7,0612x +31,599 |
| R2 = 0,9734 | R2 = 0,7012 | R2 = 0,696 | R2 = 0,6935 | |
| 4-hydroxy benzoic acid | y = 0,717ln(x) - 6,5962 | y = 0,3317x +16,296 | y = 0,4997x + 23,65 | y = 0,6571x +28,897 |
| R2 = 0,5678 | R2 = 0,996 | R2 = 0,9988 | R2 = 0,9949 | |
| gallic acid | y = 16,453ln(x) - 14,336 | y = 6,755x + 34,731 | y = 6,2792x +38,627 | y = 6,0553x +40,479 |
| R2 = 0,8706 | R2 = 0,6933 | R2 = 0,6946 | R2 = 0,6944 | |
| gentisic acid | y = 20,714ln(x) - 21,066 | y = 8,4234x +15,772 | y = 8,4601x +15,565 | y = 8,4678x + 15,63 |
| R2 = 0,867 | R2 = 0,8618 | R2 = 0,8587 | R2 = 0,8534 | |
| syringic acid | y = 15,886ln(x) - 34,339 | y = 8,8906x +0,8238 | y = 9,0153x +1,2277 | y = 9,0618x +1,7499 |
| R2 = 0,9276 | R2 = 0,9983 | R2 = 1 | R2 = 0,9993 | |
| vanillic acid | y = 18,198ln(x) - 56,706 | y = 7,4061x +20,491 | y = 7,4958x +22,747 | y = 7,5456x +23,969 |
| R2 = 0,9922 | R2 = 0,8172 | R2 = 0,8 | R2 = 0,7811 | |
| quinic acid | y = -0,228ln(x) + 3,2284 | y = 0,0762x +1,2226 | y = 0,073x + 0,2762 | y = 0,0716x +0,0101 |
| R2 = 0,0116 | R2 = 0,1631 | R2 = 0,2288 | R2 = 0,2726 | |
| Hydroxycinnamic acids | ||||
| caffeic acid | y = 25,419ln(x) - 49,124 | y = 8,7381x +8,8634 | y = 8,6571x +10,423 | y = 8,5701x +11,812 |
| R2 = 0,9793 | R2 = 0,951 | R2 = 0,9332 | R2 = 0,9193 | |
| cinnamic acid | y = -1,027ln(x) + 6,357 | y = 0,1411x - 1,9505 | y = 0,1755x - 2,2262 | y = 0,2145x - 2,5797 |
| R2 = 0,6459 | R2 = 0,8375 | R2 = 0,8428 | R2 = 0,8617 | |
| m-coumaric acid | y = 0,2398ln(x) - 1,6392 | y = 6,2795x +27,583 | y = 6,5439x +28,081 | y = 6,719x + 28,354 |
| R2 = 0,1882 | R2 = 0,7141 | R2 = 0,7066 | R2 = 0,7056 | |
| o-coumaric acid | y = 6,7012ln(x) - 40,586 | y = 8,8414x +3,2226 | y = 8,6253x + 6,454 | y = 8,4617x + 8,827 |
| R2 = 0,9646 | R2 = 0,9988 | R2 = 0,9957 | R2 = 0,9914 | |
| ferulic acid | y = 17,487ln(x) - 44,137 | y = 6,6475x +35,121 | y = 8,9241x +12,207 | y = 8,7703x +13,727 |
| R2 = 0,957 | R2 = 0,7163 | R2 = 0,6871 | R2 = 0,6832 | |
| rosmarinic acid | y = 19,03ln(x) - 14,907 | y = 8,6155x - 2,8215 | y = 7,4164x + 2,886 | y = 7,3909x +5,1093 |
| R2 = 0,8559 | R2 = 0,9616 | R2 = 0,7473 | R2 = 0,8208 | |
| Flavonoids | ||||
| Isoorientin | y = 13,257ln(x) - 19,694 | y = 8,5707x + 3,867 | y = 8,6168x + 6,527 | y = 8,5531x +9,2233 |
| R2 = 0,8943 | R2 = 0,9947 | R2 = 0,987 | R2 = 0,9649 | |
| Luteolin | y = 21,565ln(x) - 35,392 | y = 7,8483x + 18,56 | y = 7,5396x +23,126 | y = 7,3676x +25,616 |
| R2 = 0,952 | R2 = 0,9276 | R2 = 0,8803 | R2 = 0,8506 | |
| Myricetin | y = 11,564ln(x) - 17,612 | y = 7,1765x +30,905 | y = 7,0466x +32,303 | y = 6,9401x +33,496 |
| R2 = 0,7466 | R2 = 0,7125 | R2 = 0,7078 | R2 = 0,699 | |
| Rutin | y = 12,055ln(x) - 11,168 | y = 5,9994x +4,5775 | y = 6,4475x +5,2555 | y = 6,721x + 5,5234 |
| R2 = 0,6767 | R2 = 0,9841 | R2 = 0,9803 | R2 = 0,9793 | |
| Catechin | y = 22,859ln(x) - 38,078 | y = 8,6177x +15,505 | y = 8,4397x +19,756 | y = 8,3161x +21,566 |
| R2 = 0,9958 | R2 = 0,8063 | R2 = 0,7194 | R2 = 0,6949 | |
| Taxifolin | y = 16,659ln(x) - 40,697 | y = 5,1243x +17,591 | y = 5,9487x + 21,95 | y = 6,3619x +26,069 |
| R2 = 0,8768 | R2 = 1 | R2 = 0,9949 | R2 = 0,9867 | |
| Synthetics | ||||
| BHT | y = 22,141ln(x) - 66,406 | y = 5,011x - 0,588 | y = 5,8966x -0,0665 | y = 6,4687x + 0,1425 |
| R2 = 0,9984 | R2 = 0,9069 | R2 = 0,9165 | R2 = 0,9231 | |
| n-propyl gallate | y = 6,6524ln(x) + 27,928 | y = 8,1591x +16,728 | y = 8,0406x +18,679 | y = 7,9547x + 20,03 |
| R2 = 0,4045 | R2 = 0,8699 | R2 = 0,8568 | R2 = 0,8446 | |