本文介绍了正己烷标准气样配制装置和分析过程。根据正己烷在不同的温度下有不同的饱和蒸汽压,提出了在不同的温度下计算正己烷在氮气氛中气化浓度的理论公式。标准气样浓度值与日本堀场MEXA-321型分析仪所作标准气体值对比,差值一般在0—±3％之内。本方法设备简单,操作方便,所配之气样可供五级精度的红外仪表校准使用。 This article describes the n-hexane standard gas sample preparation device and analysis process. According to different saturated vapor pressures of n-hexane at different temperatures, a theoretical formula for calculating the concentration of n-hexane in a nitrogen atmosphere at different temperatures is proposed. Standard gas sample concentration and Japan HORIBA MEXA-321 analyzer standard gas value comparison, the difference is generally within 0 - ± 3%. The method has the advantages of simple equipment and convenient operation, and the gas sample provided by the method can be used for calibrating infrared instruments with five-level accuracy.