For a thorough discussion of the interference problems caused by NBS127, 
see Straight et al. 2004, Rapid Comm. Mass Spec. 18: 2897-2903. I can 
send a PDF to anyone who wants one.
Jon


Gerard Olack wrote:
> 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
>> Fax: +44 (0)28 9066 3754
>> Email: [log in to unmask]
>> 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
>>
>>   


-- 
Jonathan D. Karr, Ph.D.
Technical Director, Duke EnVironmental stable Isotope Laboratory (DEVIL)
Duke University Dept.of Biology
3322 French Science Center
Science Drive
Durham, NC 27708-0340

(919) 660-7418
Fax: (919) 660-7425
[log in to unmask]
laboratory website: http://www.biology.duke.edu/jackson/devil/




Adversity is an opportunity