A Buchner funnel is a porcelain funnel with a flat, perforated
bottom. This funnel is used only for vacuum filtration.A holed
rubber stopper or adapter is needed to hold the funnel in place
inside the neck of a suitably-sized filter flask.When the side-arm
of the filter flask is attached to the aspirator (or to a vacuum
trap attached to the aspirator), anyliquid poured into the top of
the Buchner funnel is quickly sucked into the flask, ideally
leaving any particulate matteror precipitate on the filter paper
inside the funnel. Any precipitate can then be effectively
air-dried simply by leavingthe vacuum connected, drawing air
through the precipitate. Sizes may vary.Specification of Funnels
with perforated Filter Disc, GlazedOD (mm)Dia.of tube(mm)Total
height(mm)Bowl height (mm)Perforations dia.(mm)No of
Perforations201045152194014652223750168025237601810030251802213040251100241504528812030170602123130321906521231503622070216418040250802.521220045270902.5212250503101102.5326300603801402.5463/*
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