We have used glass vials with a built-in insert from SUN-SRI (VWR
p/n14232-654). Since the insert is fused together, it seems to form a
better seal when crimped.  
tim


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-----Original Message-----
From: Stable Isotope Geochemistry [mailto:[log in to unmask]] On
Behalf Of Erik D. Pollock
Sent: Tuesday, December 01, 2009 7:16 AM
To: [log in to unmask]
Subject: Re: [ISOGEOCHEM] Vial inserts

Alison,
   I have used national scientific company 100 ul insert with a
polyspring without problem. part number c4012-530

Erik D Pollock
Manager - University of Arkansas Stable Isotope Lab
632 Science and Engineering Hall
Fayetteville, AR 72701
479-575-4506
http://www.uark.edu/ua/isotope/index.php

----- Original Message -----
From: Alison Sloat <[log in to unmask]>
Date: Tuesday, December 1, 2009 2:14 am
Subject: [ISOGEOCHEM] Vial inserts
To: [log in to unmask]

> 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?
> 
> Thank you!
> 
> Alison Sloat
>