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2 Argonne National Laboratory is not very good at URLs, apparently
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I don't think anything short of HPLC or extraction and purificationextraction 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.

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.

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.

1
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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.