The Carbon Cycle Greenhouse Gases Group [CCGG] is presently responsible for maintaining the World Meteorological Organization [WMO] mole fraction scales for CO2, CH4, and CO. With the mission of propagating this scale for data intercomparison, CCGG can fill and calibrate compressed gas cylinders for use as standard reference gases by other laboratories for measurements of CO2, CH4, CO, and the stable isotopes of CO2 (C13 and O18). Information about how standard reference gases are filled can be found here. CO2 can be adjusted and calibrated between 250 and 3000 umol/mol. The target CO2 value is within 5 umol/mol for near ambient concentrations. Cylinder valve connection is CGA-590. The cylinders are AL150 type, with a volume of 29 liters, which is approximately 4014 liters when pressurized to 134 atmospheres. CH4 and CO can be adjusted but with greater targeting variability. The CO2 stable isotope calibration is based on a provisional scale maintained by INSTAAR at the University of Colorado. A standard gas cylinder requires 4-6 weeks to fill, and an additional 4-6 Weeks to calibrate. The normal turn-around time varies due to seasonal logistics and calibration queue.
A purchase can only be initiated through a project contract. Here is an example Memorandum of Understanding [MOU] Contract
- Your project MOU can be obtained by contacting our standards coordinator, Duane Kitzis.
- No alteration of MOU text please
- Two signed hard copy MOUs would be mailed to the attention of Duane Kitzis
- MOU stipulates payment terms of "Net 30 days after invoice".
- MOU includes a statement of requested materials, shipping and contact information.
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Costs for Standard Reference Gases as of 26 JUN 2007 |
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Aluminum cylinder filled. |
$615 to $1005.00 |
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CO2 WMO scale NDIR RANGE 250-500 PPM |
460.00 |
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CO2 WMO scale NDIR RANGE 500-3000 PPM |
550.00 |
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CH4 RANGE 1500-2000 PPB |
330.00 |
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CO RANGE 40-300 PPB |
330.00 |
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Stable Isotopes of CO2 [C13 & O18] |
330.00 |
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N2O RANGE 100-360 PPB, SF6 RANGE 1-10 PPT |
440.00 |
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Shipping and handling Costs |
$130.00 |
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Shipping and handling Costs |
$250.00 |
One recalibration after use is included in the cost of the standard gas.
This is HIGHLY RECOMMENDED every 3 years for precision work and should at least
be performed at the end of the cylinder's use (20 atm
pressure). The cost of recalibration after the first recalibration is:
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CO2 recalibration |
$220.00 |
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CO or CH4 recalibration |
$220.00 |
For more information and pre-purchase quotes, e-mail Duane Kitzis. A quote is necessary before accepting a purchase order. Inquiries can also be made through the following address, fax, or phone:
National Oceanic and Atmospheric Administration
Global Monitoring Division
Carbon Cycle Greenhouse Gases group
R/GMD1
325 Broadway
Boulder, CO. 80305
E-Mail duane.r.kitzis@noaa.gov
Phone 303-497-6675
Fax 303-497-6290