rgin-top: 3.0pt;margin-right:3.0pt;margin-bottom:.75pt'>
Katherine,
Being in
In my experience, the key safety issues are 1) the flask must be clamped to prevent tip-overs and the hoses should be easily flexible to relieve pressure from the hose to reorient the flask even when moving it around (weights will not always overcome the hose), and 2) pulling vapors of low-boiling solvents into your water stream (e.g. ether, THF, methanol, Acetonitrile, pentane, hexane, and others). A chilled trap is great for the latter issue. Better is the chilled trap and the use of filtr ation pumps with venting up the hoods. For an academic setting the pumps ca n serve several students (these are not the high vac systems).
Lee Latimer p>
From:
DCHAS-L
Discussion List [mailto:DCHAS-L**At_Symbol_Here**list.uvm.edu] On
Behalf Of Katherine Wall
Sent: Thursday, July 09, 200
9 9:56
AM
To: DCHAS-L**At_Symbol_Here**LIST.UVM.EDU
Subject: [DCHAS-L] vacuum
filtration safety
Are there any safety consideration in using vacuum filtration (side-arm vacuum filtration Erlenmeyer flask with adaptor and Buchner funnel using the building va cuum line) without a trap? Or is the trap's only purpose to collect back-f low from a water aspirator?
Thank you !
Kathy Wall
Chemistry Lab Coordinator
Office SCI 204
Rt 47 at
(630) 466-7900 ext 2347
email kwall**At_Symbol_Here**waubonsee.edu
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