Consensus Reference Material (CRM)

GET STARTED
1
Request Info
2
Visit
3
Apply
GET STARTED
1
Request Info
2
Visit
3
Apply
CTD Collection Team Seawater collection on the F.G. Walton Smith
Consensus Values of DOC and TDN

Our dissolved organic carbon (DOC) lab is involved in a program that provides Consensus Reference Material (CRM) to the international community of DOC analysts.

Learn more about the Organic Biogeochemistry Research group.

CRM Use

The CRMs should be used when you wish to reference your results against the international community of DOC analysts. We have several thousand vials of each CRM available, so we encourage their use on each analytical day. More vials will be prepared for distribution as needed. The good news is that more and more DOC labs around the world are using DOC CRMs since this project started in 1999. By the end of 2017, 2004 boxes of CRM vials were sent to 241 DOC labs in 45 countries.

Funding

The cost of developing and maintaining the DOC-CRM program has been generously borne by the U.S. National Science Foundation. The program is currently slated to run into the year 2021. Subsequent funding will be contingent on the success of the program, as demonstrated by the DOC community's commitment to the use of CRMs. If we use them effectively, the program may continue. If we elect to not use them, the service will end.

Available CRMs

The deep seawater reference (DSR) water is collected in the Florida Straits at 700 m depth. We also have now available mid seawater reference (MSR), this water is collected at 150 m depth and surface seawater reference (SSR) which is collected at 5 m depth. The low carbon water (LCW) is prepared using water from our Milli-Q® Advantage A10 System.

DSR water (41-45 μM DOC), MSR water (54-58 uM DOC), SSR water (71-75 uM DOC) and LCW (∼0 and 1 μM DOC) are available in 20 and 40 mL vials. They have been acidified with hydrochloric acid and tested to be stable for at least two years. They should be stored in the dark at room temperature. These waters have been tested for DOC concentrations by the laboratories of Prof. Craig Carlson, Prof. Dennis Hansell and Lillian Custals, Prof. Hiroshi Ogawa, Prof. Liz Minor, Dr. Chiara Santinelli, and Prof. Rainer Amon.

The consensus values of DOC and total dissolved nitrogen (TDN) for each CRM batch can be found in Table 1 below.

 

Product Name Depth Collected Volume Vials per Box Price
DSR Deep Seawater Reference 700 m 20 ml 72 $100
DSR Deep Seawater Reference 700 m 40 ml 72 $200
MSR Mid Seawater Reference 150 m 20 ml 72 $100
MSR Mid Seawater Reference 150 m 40 ml 72 $200
SSR Surface Seawater Reference 5 m 20 ml 72 $100
SSR Surface Seawater Reference 5 m 40 ml 72 $200
LCW Low Carbon Water Reference Prepared in Lab 20 ml 72 $50
LCW Low Carbon Water Reference Prepared in Lab 40 ml 72 $100

 

Cost & Shipping

The cost per box of 72 × 20 mL vials is $50 for the LCW and $100 for DSR, MSR and SSR respectively. The cost per box of 72 × 40 mL vials is $100 for the LCW and $200 for DSR, MSR and SSR respectively. As before, users need to pay for the cost of shipping. To request CRMs, please provide your name, number of vials required of each CRM (minimum of 36 vials of LCW, DSW, MSR and SSR), your shipping address and telephone number. We will ship most CRMs via FedEx or DHL. If your institute has a FedEx, DHL or other courier account number, please send that to us and we will ship immediately. If your institute does not have a courier account, you will be charged in the sum of the cost of the vials and that of shipping. An invoice will be sent to you in 2-6 weeks after you receive the vials. Instruction on ways to pay the bill will be included in the invoice.

Please contact Lillian Custals for more information or to place orders.

Lillian Custals
CRM Program Manager
University of Miami
Rosenstiel School of Marine and Atmospheric Science
4600 Rickenbacker Causeway
Miami, FL 33149
Email: lcustals@rsmas.miami.edu
Tel: 305-421-4049
Fax: 305-421-4689

 

CRM Program Manager