|
Effects of pH and anthocyanin concentrationon color and antioxidant activity of Clitoria ternatea extract |
|---|---|
| รหัสดีโอไอ | |
| Creator | Kuntapas Kungsuwan, Kanjana Singh, Somchai Phetkao and Niramon Utama-ang |
| Title | Effects of pH and anthocyanin concentrationon color and antioxidant activity of Clitoria ternatea extract |
| Publisher | Faculty of Agro-Industry |
| Publication Year | 2557 |
| Journal Title | Food and Applied Bioscience |
| Journal Vol. | 2 |
| Journal No. | 1 |
| Page no. | 31-46 |
| Keyword | Clitoriaternatea, anthocyanins, color, antioxidant activity and pH |
| URL Website | www.tci-thaijo.org/index.php/fabjournal |
| Website title | www.tci-thaijo.org/index.php/fabjournal/article/view/77397 |
| ISSN | 2286-8615 |
| Abstract | Clitoria ternateaflower is commonly used in Thailand as a source of natural coloring for food and cosmetics. Its colorpigments aremostlycomprised of anthocyanins which showhigh antioxidant activity and ability to change color according to pH.These benefits can be appliedto produceinnovative products such as antioxidantbeveragesand intelligent filmswhichcan sense pH change.Thus, to evaluate possibility of the applications, changesin color,antioxidant activityand color acceptanceof crude anthocyanin extractshadbeen evaluated over a pH range of 3to 9and different anthocyanin concentration from 10 to 20 mg/100 mL of the extract using response surface methodology.As a result, pH was a major factor influencing bothcolor and antioxidant activity, whileanthocyanin concentrationshowed only a minor influence. Although color acceptance wasnot significant,the change in color of extracts wasapparent; for instance, the color of the extract wasred in acidic solution, blue in neutral solutionand green in basic solution. Furthermore, the antioxidant activity showed high activity at acidic pHandgradually decreasedas pH increasedto basic value.Consequently,the optimum point yielding highest antioxidant activity in this study was atpH 3 and 20 mg/100 mL anthocyanin concentration. |
