HI Greg--

One other note, don't run phosphates after sulfates--though sulfates 
after phosphates is ok...

take care

gerry

Wolfram Meier-Augenstein wrote:
> Dear Greg,
>
>
> We have run sulphates on our TC/EA without any problems. To be honest, we were pleasantly surprised how unproblematic the analysis was and how good the results were (right on the money) considering what problems people reported for pre-TC/EA methods.
>
> In anticipation of problems we run sulphates with and without the addition of graphite or milled charcoal (chemistry grade not BBQ) and saw no difference in the results.
>
> Same as you we figured the silver was taken care of the sulphur since subsequently run organic house standards (i.e. on the same reactor) showed no signs of being adversely affected.
>
>
> Best,
>
> Wolfram
>
> *********************************
> Dr W Meier-Augenstein
> Senior Lecturer
>
> Environmental Forensics & Human Health Research Group
> EERC, S.P.A.C.E.
> Queen's University Belfast
> David Keir Building
> 39-123 Stranmillis Road
> Belfast, BT9 5AG
> United Kingdom
>
> Tel.: +44 (0)28 9097 4015
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> URL (Isotope Lab): http://www.qub.ac.uk/eerc/people/academic_staff/wma/wm_a/siff.htm
> URL (Research): http://www.qub.ac.uk/eerc/people/academic_staff/wma/wm_a/efnhh.htm
> ________________________________________
> From: Stable Isotope Geochemistry [[log in to unmask]] On Behalf Of Cane, Greg [[log in to unmask]]
> Sent: 27 July 2007 18:09
> To: [log in to unmask]
> Subject: NBS-127 on TC/EA
>
> Anyone ever use NBS-127 (Barium sulphate) on their TC/EA? I'm a little
> worried about sulphur generation, however I'm assuming the silver
> capsules will take care of sulphur generation during the reaction. Any
> thoughts, advice?
>
> Greg
>
>
> Greg Cane, Lab Manager
> W.M. Keck Paleoenvironmental & Environmental Stable Isotope Laboratory
> University of Kansas, Dept. of Geology
> Multidisciplinary Research Building
> 2030 Becker Drive, RM 130
> Lawrence, KS
> 66045
> Tel: 785-864-7750
> Fax: 785-864-1906
>
>