Vacuum Filtration with solvents - which vacuum pump is compatible?

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Vacuum Filtration with solvents - which vacuum pump is compatible?
When performing a vacuum filtration, the solvent present can dictate the pump used. This is because some pumps are not "chemical duty" - with seals that work well with water vapours, but could degrade over time if exposed to organic solvent or acidic or basic vapours. We have taken a look at some of the common solvent categories and which vacuum pumps are most suited for use with them to give a long service life. [caption id="attachment_6859" align="aligncenter" width="300"] A Vacuum Filtration setup (also known as Buchner filtration) - but which pump should be used with different solvents?[/caption] Aqueous Vapours (Water)
  • Example solvents; water or water based liquid
  • Example applications; suspended solids analysis, food slurry analysis, removing water from solids of interest
  • Pump choices; since water vapours are not corrosive, a WOB-L pump or a basic Dry Vacuum Pump would be sufficient.
  Mild Chemical Vapours
  • Example solvents; weak acids, weak alkalis or bases
  • Example applications;¬†environmental study field samples that may contain traces of acids or chemicals, chemical lab samples known to be in weak acid or base as a solvent
  • Pump choices; the MPC090E pump
  Low-volume Organic Vapours
  • Example solvents; alcohol solutions
  • Example applications; solid phase extractions with alcohol solutions, heavily contaminated field samples
  • Pump choices; the MPC090E model, or MPC105T
  Strong Chemical Vapours
  • Example solvents; chlorinated solvents, strong acids or strong alkalis / bases, ketones
  • Example applications; chemical extractions using chlorinated solvents, workup or isolation after organic synthesis, any sample with a noticeably strong odour or pH
  • Pump choices; MPC301E
  Of course there are a wide variety of pumps available, to suit all sizes, budgets and applications - but ensuring the pump you choose is compatible with the chemicals present will make sure you achieve a long service life. Follow the links above to find out more about the recommended pumps, try the filters on our pump page here, or contact us with any queries;

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