|
|
|
| The Uncertainty Evaluation of Determining the Moisture in Gases by the Method of Cavity Ring Down Spectroscopy |
| ZHOU Xin,ZHOU Ze-yi |
| National Institute of Metrology, Beijing 100013, China |
|
|
|
|
Abstract A new method for determining the moisture in gases by the cavity ring down spectroscopy is available to measure the concentration between 0.2×10-9 mol/mol and 20×10-6 mol/mol.A mathematical model is established for the uncertainty evaluation,and the results of the expanded uncertaunties are in the range of（8～20）×10-9 mol/mol （k=2, p=95%）.
|
|
|
|
|
|
|
|
［1］Brewer P J,MiltonM J T,HarrisP A,et al.International comparability in measurements of trace water vapour［R］.NPL Report AS59, 2011.
［2］Yan W B,Chen Y,Chen H, et al.Development and applications of continuous-wave cavity ring-down spectroscopy［J］.Int J Thermophys,2008, 29(5): 1567-1577.
［3］JCGM100—2008.Guide to the Expression of Uncertainty in Measurement［S］. |
|
|
|
2012, Vol. 33 
