【摘要】 文章对高压气瓶中二氧化硫气体标准样品的制备方法进行了研究 ,对各种可能影响二氧化硫气体标准样品量值准确性的因素进行了分析。所制备的 2 0 .2 μmol/ mol二氧化硫气体标准样品的不确定度仅为 1 .4 % ,且具有良好的压力稳定性并能稳定保存 2 0个月更多还原

【Abstract】 The method for preparing standard gas of sulfur dioxide in nitrogen has been studied and the uncertainties has been carefully evaluated The SO 2 standard gas has good pressure stability and can be stored at aluminum cylinders more than 20 months更多还原