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用扩散管发生甲醇蒸气浓度标准的方法上文已作了报道。本文对扩散管发生乙醇蒸气浓度标准进行了研究,并探讨了影响扩散率的有关因素。实验结果表明,用扩散管发生的乙醇蒸气浓度的精度可达1％以内,可以作为标准气源来校准乙醇检测器及乙醇的分析方法。实验部分实验装置同上文。主要试剂为无水乙醇(优级纯,纯度不低于99.5％,北京化工厂),按文献方法再进行脱水纯化。结果与讨论
The method of using standard diffusion of methanol vapor concentration has been reported above. In this paper, the standard of concentration of ethanol vapor in diffuser tube was studied, and the factors affecting the diffusivity were discussed. The experimental results show that the accuracy of the concentration of ethanol vapor generated by the diffusion tube can be within 1%, which can be used as a standard gas source to calibrate the ethanol detector and the analysis method of ethanol. Experimental part of the experimental device with the above. The main reagent for the anhydrous ethanol (excellent grade pure, purity of not less than 99.5%, Beijing Chemical Plant), according to the literature method and then dehydration and purification. Results and discussion