• Technique

  Methanol detected in charcoal filtered alcohol

  Posted by ginface7 on December 6, 2024 at 9:40 am

  Hi,

   

  I’m was working on a charcoal filtered spirit.I’m revisiting it after a long time. I’d been producing a 96% spirit with a methanol test coming in at 0.5 mg/L. After diluting this to 60% ABV we have then used a  3 cylinder GAC system, followed by cartridge filtration through three chambers at 25um,10um,5um. To this i’ve added 0.001% glycerin and 0.00025% of a flavoring.

   

  Coming back to the sample a year later for restarting the project the methanol level of the sample has gone up to 1.4/L when I’ve had it tested again.

   

  I and working partner at a loss as to what could have caused such a drastic increase in the methanol concentration.

   

  Does anyone have experience or guidance?

   

  Cheers

  ginface7 replied 1 week, 2 days ago 1 Member · 0 Replies
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