Hi Robert--

I meant clean.  PermaPure has a protocol for their PD dryer series you 
can adapt (http://www.permapure.com/Products/pd/PD.htm) for your piece 
of tubing.  I find it difficult to get the nafion tubing back in the 
dryer in the gasbench, so try attaching it to a piece of glass capillary 
that you can use to pull it through the dryer.

take care

gerry

Robert Van Hale wrote:

> Hello Gerard,
> Can you clean nafion - or do you mean to simply replace nafion?
> Thanks
> Robert
>
> ----- Original Message ----- From: "Gerard Olack" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Sunday, November 20, 2005 10:30 AM
> Subject: Re: [ISOGEOCHEM] Delta plus problem
>
>
>> HI Dana--
>>
>> Refocus?  So it's not just a peak-centering issue..hmmm...  And what 
>> are the background gases like?
>>
>> It may be time to clean the source.  Alternatively, if there are 
>> large changes in the water background, things can get screwy.  In 
>> that case, you may need to clean the nafion tubing.
>> good luck...
>>
>> gerry
>>
>> Dana Biasatti wrote:
>>
>>> Hello,
>>>
>>> I am having a problem with our Delta plus XP, and I am hoping that 
>>> someone
>>> may be able to offer some helpful insight.
>>>
>>> Last year, we were able to run 70+ carbonate samples at a time on 
>>> the gas
>>> bench, with no problems, meaning that we were getting good results for
>>> almost all samples (SD <0.1 per mil).
>>>
>>> Over last summer, we had some problems with leaky SGE valves and that
>>> problem was resolved.
>>>
>>> Now, we can no longer run 70+ samples without encountering problems. 
>>> During
>>> a run, the first 10 to 30 samples will run fine (SD <0.1 per mil), 
>>> but then
>>> the noise suddenly increases (samples have SD's >0.1 per mil and 
>>> sometimes
>>>
>>>> 1.0 per mil). So we have to stop the run, re-focus the mass spec, and
>>>>
>>> restart the run. After the mass spec is refocused, it will run fine 
>>> again
>>> for the first 10 to 30 samples (the number is highly variable), and 
>>> then we
>>> have to stop again and repeat the above process.
>>>
>>> Has anyone else had this same experience? Any advice would be greatly
>>> appreciated.
>>>
>>> Dana Biasatti
>>>
>>>
>>
>