The source of the carbon would depend on the manufacturer. Coconut shells when converted to charcoal are on example of a source for the carbon. Activation is merely the exposure to oxygen during the process. There is an established ASTM Method for this type of analysis. ASTM develops many standard methods for sale to industries or laboratories using teams of specialists.
_________________ With friends like Guido, you will not have enemies for long.
“Intellect is invisible to the man who has none” Arthur Schopenhauer
"The difference between genius and stupidity is that genius has its limits." Albert Einstein
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