A solute (carbonized fine particles) was initially water insoluble. I treated it with nitric acid+water (7:3) under reflux condition for 3-4 hrs and I got a brownish solution to make it soluble. I removed insoluble solute by centrifugation. After centrifugation I got around 85 ml from 100 ml initial volume. How can I remove nitric acid and water to get my water soluble particles. Can I dilute it with water and then dry on water bath?
It is a good idea, but I would recommend first to neutralize remaining HNO3 by NaHCO3, a and then centrifuge, rinse with water, and repeat the procedure, say, three time. Then you can dry you particles in the exicator, if you like.
Maybe You should concentrate your solution and then try crystallize your particles?
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