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Question

Hi,today I have problem with bubbles. 
 I can't eliminate them,I change the flasks,I used ultrasonic bath. 
 No way.

H.Ahmadpour · Accepted Answer

You experienced a phenomenon called "cavitation". This is due to dirty or clogged solvent filter (picture). For assurance you can TEMPORARY remove solvent filter and run the pump. If the bubbles disappear you need to exchange the solvent filter with a new one. 
 What you saw was not "air" bubbles but was "gas" bubbles which is produced by solvent evaporation due to decreased pressure. Since pump pistons suck up the solvent, a vaccum build up in solvent intake place (filter) and If solvent can not pass through the filter efficiently, gas bubbles will produce.

sschombu · Answer

Do not try to clean the glass inlet frits, e.g. by sonicating them or boiling in Nitric Acid. Just bin them and go for new ones. Alternatively you can order SST inlet frits, which can be cleaned and re-used. Poresize is 20um vs. ~14um.

smailchimiste83 · Answer

Thank you.

smailchimiste83 · Answer

At the filter in the mobile phase bottles.

smailchimiste83 · Answer

Thank you.

smailchimiste83 · Answer

Thank you.

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