Filter paper is conditioned by adding de-ionised water while using the vacuum pump. The sample is filtered. It is not necessary to wash sample at this stage. The filtrate is discarded. The sample is transferred from the funnel and placed on a hotplate at 80o for 1 hour.
Filter paper is conditioned by adding de-ionised water while using the vacuum pump.
The sample is filtered and washed with de-ionized water until neutral pH. The filtrate is discarded. Alkali wash and N2 flush. The sample is transferred from the funnel and a magnetic stirrer added. The sample is stirred and flushed with nitrogen for 1 hour. Filter paper is conditioned by adding de-ionised water while using the vacuum pump.