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Stable Isotope Geochemistry

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Date:
Wed, 12 Apr 2017 07:08:32 -0400
Reply-To:
Stable Isotope Geochemistry <[log in to unmask]>
Subject:
d15N and d13C of the POM
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Sender:
Stable Isotope Geochemistry <[log in to unmask]>
From:
Sofia Goncalves <[log in to unmask]>
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Dear Isogeochem members,
 
We are analysing some difficult samples of POMs for d15N and d13C on our EA 2000 IRMS Delta V Advantage. These samples are colleted and analyzed on filters and have a high C/N.

Some of these samples gives peaks with strange shape and integration. The separation is not good either.

The analytical conditions are as follows: 
- carrier flow 90ml/min
- oxygen flow: 200ml/min
- reference flow: 200ml/min
- ox. reactor: 1020 Celsius
- red. reactor: 650 C
- oven: 45 C

Could anyone help me improve this type of analysis?

Thank you very much.

Best regards,

Sofia

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