A multiple filtration device for glass fibre filters

A practical multiple filter holder is described for collection of particles on glass fibre filters. The device utilizes large diameter discs and the ends of individual filter tubes compress against the filter so that, after filtration, the separate filtering areas can easily be taken from the large disc with forceps. If analyses of collected particulate matter are to be made at a later time, the filtering areas are left attached to the original filter. Precise volumes of water can be filtered by attaching volumetric pipettes to individual filter tubes.