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Our
dissolved organic carbon (DOC) lab is involved in a program
that provides consensus reference materials (CRM) to the
international community of DOC analysts.
Available
CRM
Both low carbon water (1-2 µM DOC) and deep Sargasso
Sea/Florida Straight water (44-46 µM DOC) are
available in 10 mL ampoules. They are already acidified with
hydrochloric acid and tested to be stable for at least one year. They
should be stored in the dark at room temperature. These waters have
been tested for DOC concentrations by the laboratories of Drs. Jim
Bauer, Ron Benner, Yngve Borsheim, Gus Cauwet, Craig Carlson, Bob Chen,
Dennis Hansell, Chuck Hopkinson, Ken Mopper/Jianguo
Qian, Hiroshi Ogawa and Jonathan Sharp. The consensus values
of DOC and TN for each DSR batches can be found in Table
1.
CRM
Use
The CRM's should be used when you wish to reference your results
against the international community of DOC analysts. We have several
thousand ampoules of each CRM available, so we encourage their use on
each analytical day. More ampoules will be prepared for distribution as
needed. The good news is more and more DOC labs around the world are
using DOC CRMs since this project started in 1999. By the end of 2005,
605 boxes of CRM ampoules were sent to 150 DOC labs in 26 countries.
For the CRM usage profiles, please refer to Table
2.
FUNDING
The cost of developing and maintaining the DOC-CRM program has been
borne by the US National
Science Foundation . The program is currently slated to run
into the year 2009. Subsequent funding will be contingent on the
success of the program, as demonstrated by the DOC community's
commitment to the use of CRM's. If we use them effectively, the program
may continue. If we elect to not use them, the service will end.
COST
& SHIPPING
The DOC CRM ampules are no longer free to the users as NSF cut its
funding to the program. The cost per box (144 ampules) is
$100 for DSR and $50 for LCW plus that of shipping.
To request CRM's, please provide your name, number of
ampoules required of each CRM (minimum of 72 ampoules of LCW and DSW),
your shipping address, telephone number and a means of covering the
cost. We will ship most samples via Federal Express. If your institute
has a Federal Express or other courier account number, please send that
to us and we will ship immediately. If your institute does not have a
Federal Express account, you can either pay by credit card or you will
need to send a banker's draft or international money order in the sum
of the cost of the ampules and that of shipping to:
DOC-CRM
University of Miami
RSMAS/MAC
4600 Rickenbacker Causeway
Miami, FL 33149
We will ship the CRM's to you upon receipt of this payment.
Please contact Dr.
Wenhao Chen for more informations or to place orders.
LINKS
High
Temperature Catalytic Oxidation DOC measurement: HTCO
website
CONTACT:
Dr.
Wenhao Chen
Program Manager
University of Miami
RSMAS/MAC
4600 Rickenbacker Causeway
Miami, FL 33149
wenchen@rsmas.miami.edu
Tel: (305) 421-4727
Fax: (305)
421-4689 |