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.