Sulaiman
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Quick Question: Buchner funnel size
For filtering I just ordered 250 ml Buchner/conical with side arm flasks.
(could not resist 4x 250ml boro3.3 £6.99 incl. p&p whilst browsing)
90mm diameter papers are suitable and seem the most common,
eBay vendors do not all give clear dimensions,
so,
What outside diameter porcelain Buchner funnel is suitable for 90 mm diameter filter papers ?
Edit, I have looked a little, 110 mm o.d. is my current guess
and it should have been 'Approximately what outside ..
[Edited on 6-12-2015 by Sulaiman]
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ave369
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My own Buchner funnel is a 60 mm, and I cut out the paper circles myself. A 120 mm filter paper circle makes four custom circles.
Smells like ammonia....
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Sulaiman
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so for your 60 mm funnel (i.d., o.d., ?) what diameter circles do you cut ?
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Deathunter88
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Quote: Originally posted by Sulaiman  | For filtering I just ordered 250 ml Buchner/conical with side arm flasks.
(could not resist 4x 250ml boro3.3 £6.99 incl. p&p whilst browsing)
90mm diameter papers are suitable and seem the most common,
eBay vendors do not all give clear dimensions,
so,
What outside diameter porcelain Buchner funnel is suitable for 90 mm diameter filter papers ?
Edit, I have looked a little, 110 mm o.d. is my current guess
and it should have been 'Approximately what outside ..
[Edited on 6-12-2015 by Sulaiman] |
Remember that the filter paper should be 10mm smaller than your funnel. 100mm funnel, 90mm paper.
As a result, 90mm filter, 100mm funnel.
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Dr.Bob
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Coors lists their Buchner funnels by the ID (filter paper size), not by volume or OD. The exact difference between the ID and OD varies, as they are
thicker with larger sizes. If someone lists one without the ID or filter paper size, you should just send them a note and ask them for the filter
paper size.
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AvBaeyer
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You may find this generally helpful which was easily found on the web.
AvB
Attachment: Buchner-Funnel_Dimensions Coors.pdf (475kB)
This file has been downloaded 452 times
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ave369
Eastern European Lady of Mad Science
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I fold a 120 mm filter paper circle in four, take scissors and round all the edges. As a result, I get four little circles that fit my Buchner.
Smells like ammonia....
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