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Thanks Wolf! I didn’t think Cl could make it past all of the chemicals in
the reactors.

Marilyn

On 12/6/18, 12:39 AM, "Stable Isotope Geochemistry on behalf of Wolfram
Meier-Augenstein (pals)" <[log in to unmask] on behalf of
[log in to unmask]> wrote:

>P.S.
>
>
>Just realised I typed HCl instead of Cl2.  Of course, aqueous HCl does
>not react with copper though at >600 C, who knows what may be possible
>with HCl gas.
>
>Anyhow, the point I am trying to make is the reaction any halides like
>NaCl will undergo in the combustion reactor (with water formed or
>liberated from samples) will follow this pathway:
>
>2 NaCl + 2 H2O → Cl2 + 2 NaOH + H2
>
>Therefore the product formed from halides in the combustion reactor will
>be Cl2.
>
>At temperatures above 450 C, Cl2 reacts with copper to form CuCl.
>
>
>******************************************************
>Prof. Dr W Meier-Augenstein, CChem, FRSC
>Stable Isotope Forensics & Analytical Sciences
>
>Robert Gordon University
>School of Pharmacy and Life Sciences
>The Ian Wood Building
>Garthdee Road
>Aberdeen
>AB10 7GJ
>
>E-mail:   [log in to unmask]
>
>https://onlinelibrary.wiley.com/doi/book/10.1002/9781119080190
>________________________________________
>From: Stable Isotope Geochemistry <[log in to unmask]> on behalf of
>Wolfram Meier-Augenstein (pals) <[log in to unmask]>
>Sent: 06 December 2018 08:20:21
>To: [log in to unmask]
>Subject: Re: [ISOGEOCHEM] Metal EA inserts
>
>Dear Marilyn,
>
>
>When running marine samples for external clients (which prompted the
>development of the Inconel insert) using the insert to protect the quartz
>glass reactor from weakening and developping pin holes or cracks, we used
>a traditional EA-IRMS set-up with separate combustion and reduction
>reactors.
>
>Therefore, any HCl formed would have been mopped up by the copper in the
>reduction reactor.
>
>In all our mass range magnet scans we never saw any peaks at masses where
>there shouldn't be any signal such as 36 and 38.
>
>
>Best,
>
>Wolfram
>
>
>******************************************************
>Prof. Dr W Meier-Augenstein, CChem, FRSC
>Stable Isotope Forensics & Analytical Sciences
>
>Robert Gordon University
>School of Pharmacy and Life Sciences
>The Ian Wood Building
>Garthdee Road
>Aberdeen
>AB10 7GJ
>
>E-mail:   [log in to unmask]
>
>https://onlinelibrary.wiley.com/doi/book/10.1002/9781119080190
>________________________________
>From: Stable Isotope Geochemistry <[log in to unmask]> on behalf of
>Marilyn Fogel <[log in to unmask]>
>Sent: 05 December 2018 16:38:15
>To: [log in to unmask]
>Subject: [ISOGEOCHEM] Metal EA inserts
>
>Dear Isotopers,
>
>We've been using a metal insert in our Costech EA combustion tube for the
>last month or so. The good news is that it is easy to clean out ash.
>
>We're using the metal insert because a lot of large powdered, acidified
>rocks are being analyzed. My question is the following:
>
>With the quartz inserts, some of the HCl generated from combusting salty
>or acidified samples, reacts with the quartz insert, removing at least a
>part of it. We use a silver wool plug at the bottom of the combustion
>reactor for further halide scavenging.
>
>Does anyone else use the metal inserts and see any effects of halides
>"breaking through" to the Conflo or IRMS?
>
>Regards,
>
>Marilyn
>
>Dr. Marilyn L. Fogel,
>Wilbur W. Mayhew Professor of Geo-Ecology
>Director of the Environmental Dynamics and Geo-Ecology Institute
>(http://edge.ucr.edu/)
>Dept. of Earth Sciences
>University of California Riverside
>900 University Ave.
>Riverside, CA 92521
>[log in to unmask]
>Phone: 209-205-6743
>
>
>
>
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>
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