We have gotten unlikely box and trap values after trying a series of several filaments in a Delta Plus XP. This phenomenon does not seem to influence our measurements.

Cheers,

Marshall D. McCue, Ph.D. Candidate
Website: http://comp.uark.edu/~mmccue/
University of Arkansas
Department of Biological Sciences
601 Science Engineering
Lab: 479-575-2963

----- Original Message -----
From: Charlotte Lehmann <[log in to unmask]>
Date: Monday, December 4, 2006 2:45 pm
Subject: [ISOGEOCHEM] jumpy box and trap signals
To: [log in to unmask]

> I just replaced the filament in our Delta V Advantage and I am  
> observing Box and Trap values that are jumping around all over the 
> 
> place. Is it still possible to use this filament and ignore the  
> dancing Box and Trap readings or do I need to replace this 
> filament  
> with a new one? The signal from this one is quite strong (as 
> opposed  
> to another I tried before this one which was very weak!)!
> Any thoughts would be appreciated.
> -- 
> Charlotte Lehmann
> Research Technician
> Bates College
> Department of Geology
> 206A Carnegie Science Building
> 44 Campus Avenue
> Lewiston, ME 04240
> Phone: 207-786-6485
> FAX: 207-786-8334
>