Abstract:Gas reference material of nitrogen monoxide in nitrogen at mole fractions of 0.100μmol/mol was developed by gravimetric method, the extended uncertainty was determined to be 10%. In the dilution gas purity analysis, the standard addition method was used to accurately determine the value of nitrogen monoxide in the purified high-purity nitrogen, which solved the problem of determining the value of trace gas reference materials. During the long-term stability inspection, it was found that the amount of trace nitric oxide in the gas cylinder decreased gradually with time, and the change range was 4%~8% within one year. Based on this result, factor analysis was conducted.
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HU Shu-guo,ZHANG Ti-qiang,YANG Liu-qing,DU Qiu-fang,WANG De-fa. Development of Gas Reference Material of Trace Nitrogen Monoxide. Acta Metrologica Sinica, 2023, 44(1): 144-148.
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