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Dear Mayara,

if your masspec have a dual Inlet you may fill one of the bellows with 
SO2 and run the reference gas from there at least to test the masspec.

Good luck Heike


On 2/3/2017 5:15 PM, Mayara Matos wrote:
> Dear colleagues,
>
> I'm seeking for some help from the ones working with S analysis in 
> EA-IRMS. My reference SO2 peaks started to gradually disappear over 
> time until no signal was observed, which made me think the tank was 
> getting empty. This assumption combined with the low vapor pressure in 
> the SO2 tank (showing a pressure around zero) made us purchase a new 
> tank...
>
> After installing the new SO2 tank, Isodat shows readings of no more 
> than 1 mV for m/z 64 and 3mV for m/z 66. Because of this, an error 
> message always pops up saying: "running script returns a fatal error: 
> peak center failed." I opened our Conflo IV and checked if there was 
> an actual gas flow from the tank to the capillaries coming out of the 
> heated SO2 regulator (Conflo IV) and everything seems okay. Also, when 
> I run a sequence for CNS, everything works fine for C and N but the 
> system cannot make a jump to SO2.
>
> Does anyone have a suggestion on how I can fix this problem? I 
> couldn't find this exact issue on the Isogeochem archives.
>
> Any help is appreciated.
>
> Thank you!
> Regards,
>
>
> Mayara Matos
>
>
> -- 
> *Mayara P. V. Matos *
> PhD Candidate
> Graduate Teaching Assistant
> Department of Biology
> West Virginia University
> 221 Oglebay Hall/ 4224 Life Sciences Building
> Morgantown, WV 26506

-- 
**************************************************
Heike Siegmund
Department of Geological Sciences
Stable Isotope Laboratory (SIL)
Stockholm University
S-10691 Stockholm
Sweden
Tel: ++46-8-6747726
Fax: ++46-8-6747897
Email: [log in to unmask]
Home page: www.geo.su.se/sil
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