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Stable Isotope Geochemistry <[log in to unmask]>

Subject:

IsoPrime EA-IRMS N2 measurement

From:

Yanhua Feng <[log in to unmask]>

Date:

Fri, 6 Nov 2009 13:13:51 -0500

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Stable Isotope Geochemistry <[log in to unmask]>

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Dear all,
    We have an IsoPrime isotope ratio mass spectrometer. an EuroVector 3024 
elemental analyzer is hooked up to it. the EA is configured for Carbon &amp; 
Nitrogen analysis. the software is MassLynx 4.0i.
    Carbon analysis for percentage and delta 13C is our routine. 
    We never done Nirtogen before.
    I am looking for a procedure for measuring C & N in one or separate 
analysis, I am hesitated about how to modify " EA NC run " or "EA NC diluter" 
method, cycle the magnet, when to open RN and when to open RG, how much 
pressure set for RN. 
    any suggestion or clue would be appreciated. 

Yanhua Feng

Plant & Environmental Sciences
New Mexico State University
Las Cruces, NM 88003

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