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I saw a question on here about cold brew vs hot brew caffeine content and was wondering what is the easiest (or best) way to measure this at home (if possible)

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up vote 4 down vote accepted

If you can find Ethyl Acetate (some nail polish removers), you can probably do this.

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this is exactly the kind of hacky stack overflow answer i was looking for... since you can measure the caffeine as a solid left afterwards, you can actually compare results... or rub it on your gums. –  bound008 Jul 21 '10 at 2:22
    
I wouldn't eat it. I doubt it is too pure (bicarbonate, sulfate, and impurities in NP remover), but do whatever makes you happy. –  Adam Shiemke Jul 21 '10 at 2:32
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I don't think anything short of HPLC or extraction and purification will give you a precise result. If you'd be ok with more of a rough idea of whether something has a lot or a little caffeine, there are test strips available.

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I've done simpler extractions than that... I'll have to find the procedure. –  Adam Shiemke Jul 19 '10 at 11:00
    
Test strips - nice! –  sdg Jul 19 '10 at 16:37
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