Filter papers for removing left over particles in diluted solutions?

[Seth Baldwin]

Can someone recommend me appropriate whatman filter papers (not coffee filters) for keeping my solutions ash free after dilution.

Thanks

 

[IanG]

While I have various boxes of Whatman papers I always use coffee filters in the darkroom, with any filter paper Whatman or Coffee you should refilter the first few mls anyway. If I was using Whatman papers Grade 4 is sufficient.

Ian

 

[Seth Baldwin]

Thanks. I'm confused what you mean by refilter the first few millilitres? Do you mean filter the solution multiple times in general or something else?

 

[IanG]

In laboratory work it's common to either run some distilled or de-ionised water through a filter, or some of the solution, So typically if filtering 1 litre you might start filtering and then after say 100ml return that to the container you are filtering from, this removes any particles on the new filter paper.

Ian