HI All--

Just because I like seeing my name on Isogeochem...

It's back up and running.  New reactors, and also came across loose 
connection in water trap.  That whole rain/pouring thing.

We had run some nasty samples a while back, ate holes in quartz ash 
collector--probably didn't help things. 

I'll post the hints I've been getting onto the Isogeochem wiki when I 
get a chance.

take care

gerry

Gerard Olack wrote:
> Hi Again--
>
> Post mortem reveals a semicircular crack near top of chromic oxide 
> section--seen as tube was pulled out, before all the other cracks 
> appeared.  At least it didn't break apart when I went to pull it out.  
> I hates when that happens.
>
> thanks...
>
> take care
>
> gerry
>
> Gerard Olack wrote:
>> HI All--
>>
>> Our Costech EA seems to be pushing the O2 slug through immediately 
>> (<2 secs).  We've run it for years with ~9 sec delay, and just the 
>> other day it seems that the drops are missing the O2--and just 
>> catching it if it's set to a 1 sec delay.  Background levels lower 
>> and peaks are smaller than expected, but the N2 is coming out a 
>> little early.  Sort of like when a seam opens up in the oxidation 
>> reactor, but without affecting the flow rate downstream.
>>
>> He flow rates seem reasonable, ~75 mL/min, valves seem to be 
>> switching as expected--He switches to oxygen block, goes through 
>> correct line (e.g. micro), to bottom block, and flow to ZeroBlank is 
>> only restored when O2 loop reconnected (during time it flushes 
>> loop).  He and O2 pressure on Costech around 12 psi--in the normal 
>> range.
>> Switched O2 tanks--nada.
>>
>> I will be switching out reduction tube (it's dead), and I've baked 
>> out the GC column.
>>
>> Thanks in advance for any advice--yes, I'm bad at posting thanks 
>> afterwards...
>>
>> Back to beating my head against the wall (and leak checking)....
>>
>> take care
>>
>> gerry
>>
>> p.s. yeah, I may just swap out everything...
>>
>