The preparation process of standard sample of trace carbon monoxide > methane and carbon dioxide mi-ture in hydrogen is described, and the method for analysis of its impurities was established. The performance of the standard sample was investigated* and its uncertainty was analyzed and evaluated. Comparision of analytical results from different laboratories shows that the value of the standard sample is reliable.%介绍了氢中一氧化碳、甲烷、二氧化碳标准样品制备过程,建立了标准样品杂质组分的分析方法,对该标准样品性能进行了考察,分析和评定了标准样品的不确定度,通过不同实验室的比对分析说明量值可靠.
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