We made a flushing rack from pvc pipes and syringe needles. The rack base is made by joining pvc pipes and elbow joins into a rectangular shape. One of the corners has a T-joint with a nozzle attachment that allows you to flush the rack with compressed gas cylinder via a rubber vacuum hose. We then drilled small holes in the pvc pipes and embedded the top half of syringes (sawed in half) into the holes. This allows you to screw in new syringe needles as desired. We used epoxy on the to ensure the rack is leak-tight. One of the needles is hooked up to a pressure gauge so that we can monitor the pressure our vials are flushed at. To use, place an exit needle into each vial, flip over and place on needle-rack. We flush for several minutes at 40 psi. Our original rack was set-up to flush ~72 vials by setting up several rows of needles, however given the drop-off in pressure with distance, you cannot be assured your distal vials are completely flushed. We made a 2-row rack and feel confident in its flushing capabilities.
Bethany Theiling, Ph.D.
Stable Isotope Specialist
Purdue Stable Isotope Facility
[log in to unmask]
From: Stable Isotope Geochemistry [mailto:[log in to unmask]] On Behalf Of Lambert, Joe
Sent: Monday, March 04, 2013 8:11 AM
To: [log in to unmask]
Subject: [ISOGEOCHEM] Offline Exetainer Flushing
Has anyone developed an off-line method for flushing a full batch (96) of exetainers? I am unsure of the cost of a stand alone CTC Analytics PAL autosampler. It would be great to free up the Gasbench-IRMS for only measurements and let the exetainers/tubes be prepped separately. Any thoughts?
W. Joe Lambert, PhD
2003 Bevill Building
Department of Geological Sciences
The University of Alabama
Tuscaloosa, AL 35487
Phone (205) 348-4404
Fax (205) 348-0818