摘要
介绍了环境监测用空气中二氧化碳标准气体的制备方法。该标准气体的均匀性和稳定性通过气相色谱法进行了考察，并用比对误差确认了其称量法配制值的准确性。配制的标准气体的浓度为（10～1000）×10^-6（mol／mol），定值不确定度小于2％。
In this paper, the preparation method of gas reference material of carbon dioxide in air for environmental monitoring is introduced. Both stability and homogeneity of the gas are checked by gas chromatograph; besides, the accuracy of weighing method＇s value of quantity is also affirmed by eomparesion error. The gas reference material concentration is （10 - 1000） × 10^-6（ mol/mol）, and the uncertainty value of quantity is less than 2%.
出处
《低温与特气》
CAS
2009年第1期22-27,共6页
Low Temperature and Specialty Gases
关键词
空气中二氧化碳标准气体
不确定度
称量法
gas reference material of carbon dioxide in air
uncertainty value of quantity
weighing method
