MXG
Harmless
Posts: 5
Registered: 21-2-2013
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Using charcoal
Is there a rule of thumb for the use of charcoal (and celite)? I often read of using this method to "remove colored contaminants." But then the
product in the filtrate is colored yet it was not removed. Is there a rule of thumb for what will be removed by charcoal?
Or is this just a "try it and see" tool?
Thank-you!
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Boffis
International Hazard
Posts: 1867
Registered: 1-5-2011
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When I use decolourising charcoal I usually work on 0.5 to 1% of the anticipated yield as a crude rule-of-thumb, adjusting the amount to match the
degree of coloured impurities I think I have (highly subjective I know). Too much charcoal reduces yields so it better to repeat the process several
times if you haven't added enough than add too much and end up with nothing.
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