3.2 create a standard curve (calibration curve) of standard solution L-ascorbic acid by lead compounds tanonumun solution L-ascorbic acid standards independent of each and 2 mL concentrated solution mixed with 2, 2-diphenyl-1-picrylhydrazyl (DPPH), 0.5 mg/mL concentration volume 1 mL in the test tube with lid for 30 minutes at a temperature of hong lua measured wave absorption wavelength of 515 nm light with a UV-VIS Spectrophotometer by sample test 3 times (triplicate) brings up the absorption of the acquired to create a standard curve between the concentrations of Lascorbic acid and absorption values to calculate the percent equation therefore antioxidant.
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