Subject: | |
From: | |
Reply To: | |
Date: | Sun, 20 Sep 2009 17:25:26 -0500 |
Content-Type: | text/plain |
Parts/Attachments: |
|
|
Andy,
thanks for replying. This could be what happened. These samples were
shipped from Alaska and maybe we did not tighten them enough. What a
pain....
On Sep 20, 2009, at 4:53 PM, Andrew Schauer wrote:
---------------------------------------------
Behzad Mortazavi, Ph.D.
Assistant Professor
Director of University of Alabama
M.S. Program in Marine Science
Dauphin Island Sea Laboratory
101 Bienville Blvd
Dauphin Island, AL 36528
251-861-2189 (Phone)
251-861-7540 (Fax)
[log in to unmask]
On Sep 20, 2009, at 4:53 PM, Andrew Schauer wrote:
> We used glass flasks with two teflon stopcocks for years for
> atmospheric CO2 sampling. These flasks were transported via ground
> and air shipping at all times of the year under a wide range of
> pressures. The only time we noticed problems with an entire batch
> was when they became so cold in the shipping process that the teflon
> stopcocks shrank away from the glass sidewalls and were thus, open.
> We verified this by putting some in the freezer. We started
> tightening a bit more and it never happened again.
>
> andy
>
> Andrew Schauer
> Earth and Space Sciences
> University of Washington
> Seattle, WA 98195
>
>
> 206.543.6327
> [log in to unmask]
> http://depts.washington.edu/isolab/
>
>
>
> ----- Original Message ----
> From: Behzad Mortazavi <[log in to unmask]>
> To: [log in to unmask]
> Sent: Sunday, September 20, 2009 11:12:32 AM
> Subject: [ISOGEOCHEM] Glass Vials and Shipping
>
> Hello all,
> We have collected air samples with glass flasks with teflon seals and
> once shipped on a plane the CO2 conc and 13C values were off. Do you
> guys have any suggestions or advice?
>
> I would appreciate the help.
> ---------------------------------------------
> Behzad Mortazavi
>
|
|
|