Methanol, ethanol, NaOH, NaCl, potassium ferricyanide, FeCl3, 2-thiobarbituric acid (TBA), trichloroacetic acid (TCA), 1-diphenyl-2-picrylhydrazyl (DPPH) were all Pro Analysis quality chemical reagents. LS were bought from Lubna Company (Semarang, Indonesia). LS was extracted from coconut shell pyrolysis that produces LS containing 4.13% phenolic compounds, 11.3% carbonyl and 10.2% organic acids.
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