When DPPH reacts to substances that have antioxidant activity. Purple is the color of the solution changed to yellow. By comparison, this experiment that is used as a standard Trolox example, if there is the ability to have high antioxidant. The dark purple color of the solution is reduced. From the absorbance values of standand Trolox, the result of percent inhibition is increase and the color of the tube has high volume of Trolox are changed from purple to yellow color shows that there are many antioxidants. In rambutan peel extract the result are error because wrong preparation of rambutan extract and chemicals exposure to light excessive