Dear Christina,

we have got a PDZ MS, but maybe there is also a gas feedthrough in Your
source that is loose so the gas flow is not reaching the filament; I did
not recognized this important little piece of metal tube before.

Best regards,
 Deborah


At 03:22 08.03.2006 -0500, you wrote:
>Dear list members,
>
>we are running a conflow Thermo Finnigan Delta plus XP. After cleaning the
>ion source 2 weeks ago we are suffering from the following problem: our
>intensity is very low. Mass 44, e.g., is around 100 mV, and it used to be
>6000mV. Since the calibration scan finds some peaks, we assume that the
>filament is at least working. However, we took the ion source out again
>already 2 times, and checked the filament position, the pins, all
>connections...although we found indeed once a loose connection, now all
>these parameters should be fine. But again there is far too low intensity.
>When tuning the ion source the intensity changes a little bid, but not very
>much. 
>Can anybody help us with this problem? Any recommendations are highly
welcome!
>
>Thanks!
>
>Christina
>

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Rhein. Friedrich-Wilhelms-Universität Bonn
Institut für Nutzpflanzenwissenschaften und Ressourcenschutz (INRES)
Lehr- und Forschungsbereich Pflanzenernährung
Karlrobert-Kreiten-Str. 13
53115 Bonn, Germany
Phone (+049) 0228-73-1631, -3640, -1632
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