Hi Joe, we describe a simple line to do this in Cambaliza et al 2009, RCM 23: 3868-3874.
We used a gauge specifically for vacuum and one for pressure so that vials were brought back to ambient pressure. We backfill with a variety of gasses depending on our objectives.
When flushing with the PAL, we found that running the method from the PAL keypad tends to over pressurize vials. Post flush acid injections are then more troublesome. If I am using the PAL to flush, I prefer to use a method in isodat. Simply setting the flush fill valve to close about 50s before the needle leaves the vial leaves vials only slightly pressurized and conserves the flush tank.
Manager, Stable Isotope Core Laboratory
Washington State University
School of Biological Sciences
Pullman, WA 99164-4236
Laboratory for Biotechnology and Bioanalysis (LBB2) Stable Isotope Core
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