Our delta conlo has a high backround of 18 amu (~4 volts on 15N cups) We 
thought this was water because it increases with heating.  However after 
scrubbing the He with chemical and liquid nitrogen traps no improvement was 
attained.  I sacnned way out an found a huge (10 volts on the 14N cup) peak at 
what looks to be ~78 amu and a smaller peak ~18 below that at ~59.  We think 
this might be some sort of solvent in ss lines that is passing lN2 
traps....has anyone else seen something like this?  We replaced the SGE valve 
and the problem remains...


> Dear list members:
> 
> 
> We would like to draw your attention to the following session at the  
> 2006 American Geophysical Union (AGU) Fall Meeting in San Francisco  
> (December 11-15, 2006) and invite you to submit an abstract before  
> September 7, 2006.
> 
> 
> H19: Novel Multi-Isotope Approaches to Watershed Hydrology and  
> Biogeochemistry
> 
> Sponsor: Hydrology
> Co-Sponsor: Biogeosciences
> 
> Session Description:
> Throughout the last decade, numerous novel isotopic tracers with  
> applicability to watershed hydrology and biogeochemistry have  
> emerged. These include new dating tools such as 3H/3He, stable  
> isotopes affected by mass-independent isotope fractionation in the  
> atmosphere (17O, 33S), and a number of other stable isotope ratios  
> (phosphate-O, B, Ca among many others) now measurable via new  
> analytical methodologies. This session will focus on how these new  
> isotopic tracers can be combined with more traditional tracer  
> approaches (H, O, C, N, S) to address unresolved questions in  
> watershed hydrology and biogeochemistry. Contributions in which multi- 
> tracer techniques were combined with hydrological and chemical  
> approaches are particularly welcome.
> 
> Co-Convenors:
> 
> Bernhard Mayer (University of Calgary); [log in to unmask]
> 
> Carol Kendall (USGS Menlo Park); [log in to unmask]
> 
> Tom Bullen (USGS Menlo Park); [log in to unmask]
> 
> 
> 
> 
> Session abstracts can be uploaded electronically at:
> 
> http://submissions4.agu.org/submission/entrance.asp
> 
> 
> 
> Further information regarding the 2006 AGU Fall meeting can be found at:
> 
> http://www.agu.org/meetings/fm06/
> 
> 
> 
> Yours sincerely,
> 
> 
> 
> Bernhard
> 
> 
> 
> Applied Geochemistry Group
> Department of Geology & Geophysics
> University of Calgary
> 2500 University Drive NW
> Calgary, Alberta, Canada T2N 1N4
> phone: (403) 220 5389
> fax: (403) 220 8514
> e-mail: [log in to unmask]
> web: http://earth.geo.ucalgary.ca
> 
> 
>