I think I've accidentally stumbled onto my answer before but I forgot WHY/HOW exactly freeze precip works I know some alkaloids do and some don't. I tried searching google, and couldn't find anything so I was hoping someone could explain why exactly this works on some alkaloids, and how I can find out if certain alkaloids will freeze precip so I can experiment further on my own in the future. So can someone please explain the process of how I can tell if an alkaloid will freeze precip or not, and why exactly this happens with some? I kinda know the answer it obviously has to do with some chemicals losing solubility in cold substances, however, is there anything else to it? Mostly though I want to know how to find out if this is useable for particular alkaloids.