We have been using both inserts with and without bottom springs from Alltech (now Grace), they both work well. The difference between them is how much sample they would keep while leaving no headspace.
Cheers,
 
Yi Wang (Ph.D.)
Director, Stable Isotope Laboratory
ZymaX Environmental Forensics Solutions
600 S. Andreasen Drive, suite B
Escondido, CA 92029
Tel: 760-781-3338 ext 43
Fax: 760-781-3339
Cell: 609-721-2843
http://www.dpra.com/index.cfm/m/5 <http://www.dpra.com/index.cfm/m/5m> 
 

________________________________

From: Stable Isotope Geochemistry on behalf of Robert van Geldern
Sent: Tue 12/1/2009 1:18 AM
To: [log in to unmask]
Subject: Re: [ISOGEOCHEM] Vial inserts



Alison Sloat wrote:
> I'm running water samples for D and O using 2-mL vials in our GC PAL
> autosampler. Because some of my samples are smaller than 2mL, I would like
> to use inserts to avoid headspace. After searching the archives here, I
> found the Sigma-Aldrich website, but I'm not sure which insert is best. What
> are the benefits/reasons for an insert with a bottom spring or a polyflange?
> Could someone please offer any advice, suppliers, and/or product numbers?


We successfully used inserts in standard 2ml GC vials in an Finnigan
H-Device with AS200 autosampler. We ordered them from Grace (Alltech).
Refer to page 361 of their SPE/General chromatography catalog (link
below). We used the glass 100microL without spring. I haven't tried the
models with spring, so I am not sure if they work better.


<http://www.discoverysciences.com/uploadedFiles/Site_for_Catalog_2008/general_chromatography/General_Chromatography.pdf>



regards,
Robert
--
Dr. Robert van Geldern
GeoZentrum Nordbayern / Applied Geosciences
University of Erlangen-Nuremberg
Schlossgarten 5
91054 Erlangen
Germany

mailto:[log in to unmask]
www.gzn.uni-erlangen.de
fon: +49(0)9131-85-24780 (office)
fax: +49(0)9131-85-29294
Room: O 0.106 (office)


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