Development of Methane Gas Standard Reference Material in Nitrogen by Comparison Method
With the rapid development of industry and technology,the demand for gas reference materials in electronic manufacturing,environmental monitoring,automotive exhaust testing,and third-party quality testing is increasing.In particular,the demand for monitoring atmospheric environmental safety and evaluating and testing products related to people's health and safety is increasing.The paper uses methane and high-purity nitrogen as raw materials,and uses weighing method to prepare them.The value is determined by comparing with the certified gas reference material of first-class quality.Gas chromatography detection technology is used to evaluate the homogeneity and stability of the sample.At the same time,the uncertainty introduced during the development process is calculated and evaluated.The developed methane gas reference material in nitrogen has a value of 1.00×10-2 mol/mol,an expanded uncertainty of 1％,and a validity period of one year.This reference material can be used for instrument calibration,quality control,and confirmation and evaluation of environmental detection analysis.
methane gas in nitrogengas standard substancesuncertainty evaluation
万方数据
维普
