Or alternatively
use a two pan balance which measure mass rather than weight. Things have no weight in zero-g but they still have mass. 350ml liquid will still balance a 350g mass on the other side. Although, you may need to create some centripetal force to keep the stuff on the balance itself.
( sandettie light vessel automatic New Twitter - @bollocksreally, Fri 4 Jun 2010, 21:42, Reply)