Bob,

Thank you for your response.  The samples contain the chlorinated
hydrocarbons: trichloroethylene (1 to 6 ppm), perchloroethylene (0.3 to
0.05ppm), chloroform (0.3ppm), dichloroethylene (0.4 to 0.01 ppm), and
carbon tetrachloride (0.5 to 1.3ppm).   I can easily send you the samples in
160 ml crimp-topped glass vials, or I can place the gas in whatever vial
that would be easiest for you to handle.  The number of samples would depend
on cost.  What would you charge per analysis?  I know these are low
concentrations and we use SPME to quantify these air concentrations.  What
is the limit of detection for SPME/GC-IRMS.  I have read at least 1 article
from the list of references you sent, very impressive work coming from your
lab.  Next month we are starting another study of chlorinated hydrocarbons
in groundwater and I would need the same type of analysis as you described
that you currently doing, so it is exciting to know your lab does this work.
  Thank you again for your response and I look forward to hearing from you
soon.

Best regards,

Brian Kirtland
University of South Carolina
Env. Health Sci.
[log in to unmask]
803-777-7604


>From: "Robert J. Drimmie" <[log in to unmask]>
>Reply-To: Stable Isotope Geochemistry <[log in to unmask]>
>To: [log in to unmask]
>Subject: Re: [ISOGEOCHEM] GC-IRMS
>Date: Tue, 13 Feb 2001 11:22:53 -0800
>
>Brian, We are currently analysing 13C, D/H, and 37Cl in
>chlorinated solvents and their degradation products in groundwaters
>via headspace or SPME.
>I am sure if the concentrations are high enough we could do gas
>samples.
>Contrary to Wolfram's opinion - it does not seem to crap up the
>system for at least 100 analysis.
>We have confirmed reliability of GC-C-IRMS with pure phase
>compounds run by EA-IRMS. These compounds were run as
>mixtures and out of water samples.
>
>Look in E,S & T for Hunkeler et al,  Slater et al, Poulson et al.
>
>Bob : [log in to unmask]
>
>On 12 Feb 01, at 11:15, Brian kirtland wrote:
>
>Date sent:              Mon, 12 Feb 2001 11:15:09 -0500
>Send reply to:          Stable Isotope Geochemistry
><[log in to unmask]>
>From:                   Brian kirtland <[log in to unmask]>
>Subject:                GC-IRMS
>To:                     [log in to unmask]
>
>I am looking for a laboratory that will analyze soil gas containing
>chlorinated hydrocarbons (trichloroethylene, carbon tetrachloride)
>for 13C
>using GC-IRMS.  Does anyone know of such a laboratory?  Thanks
>in advance,
>
>Brian Kirtland
>University of South Carolina
>[log in to unmask]
>________________________________________________________
>_________
>Get your FREE download of MSN Explorer at
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>Robert J. Drimmie                  [log in to unmask]
>Environmental Isotope Laboratory   Telephone: 519-888-4567
>Department of Earth Sciences       Extension: 2580
>University of Waterloo             Facsimile: 519-746-0183
>Waterloo, Ontario, Canada N2L 3G1
>http://sciborg.uwaterloo.ca/research_groups/eilab

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