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high purge flow measured on P&T
Posted: Tue Jun 09, 2015 7:03 am
by tangaloomaflyer
We have a system that has very high purge flow (120ml/min) when measured through the vent of the concentrator. Visually, the bubbles do not appear to be forming at a much higher rate than an instrument purging at 40ml/min. Am I right in assuming there must be a constriction in the flow path of the concentrator? Samples are being purged in an Archon autosampler and the sample gas is connected to the T-piece on a Velocity concentrator. the system is having problems holding a calibration. It will be steady fro a while but then responses will fluctuate.
Re: high purge flow measured on P&T
Posted: Tue Jun 09, 2015 7:19 am
by kubowicz.tomasz
Hello
What kind of glassware are you using for purging? Frit or fritless ?
Tomasz Kubowicz
Re: high purge flow measured on P&T
Posted: Wed Jun 10, 2015 2:33 am
by tangaloomaflyer
Fritless. 10ml of aqueous sample is in a gas tight vial. It is purged by the soil probe on the autosampler. No heat, 7 minute purge.
Re: high purge flow measured on P&T
Posted: Mon Jun 15, 2015 5:50 pm
by Yama001
Perhaps both the Archon and the Velocity are purging? The purge supply line to the sparger is diverted to a solenoid valve on the left rear of the Archon - in water mode it simply diverts the flow back to the sparger; in soil mode it is blocked, so only the Archon soil pruge line reaches the concentrator.
Re: high purge flow measured on P&T
Posted: Tue Jun 16, 2015 7:20 am
by tangaloomaflyer
I will double check, but we are running the Archon in soil mode.