Fully agree here.
If the ethanol is evaporated we never had any trouble.

Robert



> Am 02.12.2017 um 01:12 schrieb Siegwolf Rolf (PSI) <[log in to unmask]>:
> 
> Once it is evaporated there is no contamination anymore. Never had any complications because of ethanol after mounting a Nation onto a capillary
> which was previously plunged in ethanol.
> Rolf
> 
> 
>> On 1 Dec 2017, at 22:07, [log in to unmask] <[log in to unmask]> wrote:
>> 
>> As far as i remember ethanol may introduce sever contaminations onto CO2 isotopes.
>> Fabio
>> 
>> Inviato dal mio dispositivo Huawei
>> Fabio Marzaioli, Ph.D
>> Department of Mathematics and Physics
>> Università della Campania "Luigi Vanvitelli"
>> 
>> 
>> -------- Messaggio originale --------
>> Oggetto: Re: [ISOGEOCHEM] GB nafion -> open split capillary size ?
>> Da: gerard olack 
>> A: [log in to unmask]
>> CC: 
>> 
>> 
>> Hi Sarah--
>> 
>> The nafion tubing can be loosen by letting a drop of ethanol sit on it, then it can be gently pulled off the capillary and slide onto the new piece--then let it dry.  That should be good enough to hold--just make sure the capillary in cleanly cut.  I haven't tried using the ferrule to seal the capillary.  The isogeochem wiki has a short write up on this (note ethanol works too):
>> 
>> http://isogeochem.wikispaces.com/repair+tips  (scroll down)
>> 
>> take care,
>> 
>> gerry
>> On 12/1/2017 12:28 PM, Sarah Grosshuesch wrote:
>>> thanks Gerry ... I'll do a rebuild as you suggest.
>>> 
>>> Is there a ferrule on the 0.3 capillary where it connects to the nafion ?  size ?
>>> How about the 0.1 helium line on top of the open split ?  ferrule size ?
>>> 
>>> On Thu, Nov 30, 2017 at 3:58 PM, gerard olack <[log in to unmask]> wrote:
>>> HI Sarah--
>>> 
>>> You can build your own.  Find a straight capillary tube, e.g. glass micro pipette, that's about the same size as the outer capillary, and a glass universal capillary connector.  The connector needs to be able to fit into the tube so you may have to cut off part of one end.  Check the old set up to see how far down the constriction at the bottom is from the top of the outer tube. Epoxy the universal joint in place with its constriction at the right distance.  Follow instructions for the universal connector to hook up capillary line, and epoxy that line in place.  It might even be easier to do the last bit with the new outer capillary tube (partially) installed.  When done, the tiny capillary line going to the mass spec should be able to pass thru the connector constriction to only sample the sample gas flow.  When it is pulled out, it samples the sample plus He (dilution) gas flow.  
>>> There's a also a  modified Gasbench design where they use was looks like a GC inlet liner, not the capillary in capillary design that you have.  
>>> take care,
>>> 
>>> gerry
>>> 
>>> p.s. examples:
>>> 
>>> check sizes, e.g. Microcaps: https://www.coleparmer.com/p/microcaps-disposable-glass-micropipettes/940
>>> 
>>> connectors: http://www.restek.com/catalog/view/370
>>> 
>>> 
>>> 
>>> On 11/30/2017 3:24 PM, Sarah Grosshuesch wrote:
>>>> I need to replace the capillary from a GasBench II water trap 2 to the open split.
>>>> 
>>>> Capillary size ?
>>>> Tips on installation ?
>>>> 
>>>> 0.3 um ID fused silica deactivated capillary and 200 mm of it ??
>>>> 
>>>> The cracked capillary bits look like a smaller diameter capillary nested in a larger capillary ... 
>>>> Can I dissolve the glue holding the capillary in the bottom of the open split w/ solvent ... and then glue new capillary in place ?
>>>> 
>>>> Thanks for any advice -  Sarah
>>>> 
>>>> -- 
>>>> Sarah Grosshuesch
>>>> Large Lakes Observatory
>>>> University of Minnesota Duluth
>>>> 2205 E. 5th St.
>>>> Duluth, MN  55812
>>>> (218) 726-7206
>>> 
>>> 
>>> 
>>> 
>>> -- 
>>> Sarah Grosshuesch
>>> Large Lakes Observatory
>>> University of Minnesota Duluth
>>> 2205 E. 5th St.
>>> Duluth, MN  55812
>>> (218) 726-7206
>> 
> 
> __________________________________
> Paul Scherrer Institut 
> Dr. Rolf Siegwolf
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> CH-5232 Villigen PSI
> Switzerland
> 
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-- 
PD Dr. Robert van Geldern
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