Absorption scanning of dragon fruit peel extract
The absorption spectra scanning between 400 – 700 nm of dragon fruit peel extract from various solvents were determined by using UV-Vis Spectrophotometer.
Determination of extractable phenolic content and antioxidant capacities
The extractable phenolic content was determined as described in Kumar et al. (2008) with some modifications. The result was expressed as gallic acid equivalent per gram extract (mg GAE/g). The antioxidant capacity was determined by DPPH radical scavenging assay
1st Mae Fah Luang University International Conference 2012 2