1. Preparation and characterization of activated carbon from palm shell by chemical activation with K2CO3;Adinata;Bioresour. Technol.,2007
2. American Society for Testing and Materials (ASTM), 2013. E871-82 Standard test method for moisture analysis of particulate wood fuels.
3. American Society for Testing and Materials (ASTM), 2013. E872-82 Standard test method for volatile matter in the analysis of particulate wood fuels.
4. American Society for Testing and Materials (ASTM), 2015. E1755-01 Standard test method for ash in biomass.
5. American Society for Testing and Materials (ASTM), 2016. E1690 – 08 Standard test method for determination of ethanol extractives in biomass.