Aha, relieved to hear you attempted a non-standard technique! Coffee filters have large pores - as you have confirmed…
Getting out fine particulates (in my most recent case, precipitated tannins from a hippophae bark brew) can be achieved with a carefully rolled plug of paper kitchen towel stuffed into the neck of a funnel.
However, this is even slower than a normal gravity filtration and there is a not insignificant holdup of solvent and material on the filter plug which requires multiple washes to flush through. To that end, it's best to minimise the starting volume of the filtrate in order conserve solvent. It then ends up being like ghetto column chromatography (I observed some separation with my specimen, with yellow, then green, then blue fluorescence although this needs confirming with the help of some dilution tests).
In case anyone was thinking of trying this out as a separation technique, rolled up paper doesn't present anything like an even solvent front unless one were to be ultra-fastidious in the rolling and packing processes, and even then it's far from great. It would require a massive difference in Rf to get a useful separation of components beyond biasing of concentration.
Come to mention it, did we have any TLC or other chroma results on this conversion yet? Besides the Kykeon Analytical results, I mean.
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