I would think it would work.I'm not a chemist though. I think it would be easier to just freeze it.
killerweed420 Reviewed by killerweed420 on . Make your own urine powder? So I found this... 9.2.2.1 Making your own powdered urine: Urinate in a glass container. Let it evaporate. Then scrape the inside for the concentrate. Just mix it with water before the test, and the sample will have the correct specific gravity, pH, color, etc. Does that really work??? FBR??? Rating: 5