Sample control (no oil). Enter a pattern each of ethyl acetate and 2 ml. In vitro DPPH additions 9 ml. Bring the solution has absorption measurement at a wavelength of 515 nm against blank.
Sample control (No oil) into the solvent ethyl acetate 2 ml test tube filled solution. DPPH9 ml Solution to measure the absorption of light at a wavelength of 515 nm with a black eye.
Sample control (no oil) add solvent ethyl acetate 2 ml in vitro with solvent DPPH9 ml The solution to measure the absorption wavelength 515 nm compared with blank