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    $\begingroup$ Dichloromethane is relatively nontoxic. In an Agilent HPLC application note they don't bother with any preextraction (although they add MgO prior to filtration of the sample and injection), and running phase is relatively benign water/methanol. But it's HPLC, and methanol. You might be able to run gravity column chromatography with ethanol instead, or other available organic solvent. $\endgroup$
    – Buck Thorn ♦
    Commented Apr 29, 2021 at 5:53
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    $\begingroup$ I believe the MgO is for metal removal which might poison the column? $\endgroup$
    – Buck Thorn ♦
    Commented Apr 29, 2021 at 5:54
  • $\begingroup$ @BuckThorn if you think it can fit into a "Home science" setting, please feel free to add an answer! $\endgroup$
    – uhoh
    Commented Apr 29, 2021 at 9:02
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    $\begingroup$ Depends what kind of resources you have, I suppose. I'm still looking for a "home science" guide that would explain how to do the various steps (filtration, purification, separation, detection). If I do maybe an answer is in order. $\endgroup$
    – Buck Thorn ♦
    Commented Apr 29, 2021 at 9:06