重量法配气的称量数学模型及其不确定度评定

MATHEMATICAL MODEL AND UNCERTAINTY EVALUATION METHOD FOR PREPARATION OF GAS MIXTURE BY GRAVIMETRIC METHOD

对重量法制备气体标准物质中充入气体质量的计算方法进行了研究,建立了基于单盘电子天平的钢瓶称量方法,并建立了系统的数学模型和不确定度评价方法。为重量法制备气体标准物质提供一种简单、实用和精确的钢瓶称量方法和气体加入质量的计算方法。

A new method to calculate the gas mass filled into the cylinder in preparation of gas reference materials by gravimetric method was reported. This weighing method was based on the substitution weighting of reference cylinder and sample cylinder on the electric comparator balance. The mathematical model and uncertainty evaluation method were established. Weighing and calculation methods were able to be used to calculate the gas mass added into the sample cylinder, simply, conveniently and precisely, when gas reference standard being prepared by gravimetric method.