Hey, I've been reading on this site for a week of so now, and just wanted to say thanks for all your contributions. Very helpfull! My question is, im making zinc ferrite nano-particles and i was wondering at what RPM i should set the centrifuge to, so that the zinc ferrite comes out of solution. Is there anyway of calculating this or is it simply trial and error? I have tried putting it next to a magnet instead of centrifuge, but it is slow. Thanks!