红外光谱中挥发性液体的气态样品取样技术

Preparation Technique of Vapor Sample of Volatile Liquid for FTIR Analysis

采用设计的真空装置 ,将挥发性液体的气态样品吸入气体样池中进行红外光谱测定。用此装置测得的液体的红外光谱图不出现常规液体样品测定时的平头峰 ,峰位易辨认 ,且可定量。并探讨了挥发性液体的取样范围、浓度范围和压力条件。

A homemade vacuum device was utilized to inhale vapor samples of volatile liquid into IR sample chamber of spectrometer for IR spectrum measurement,which gives a distinguishable peaks rather than the flat peaks as those usually presented in conventional liquid sample determination,and can be used to quantitatively determine the sample.The scope, concentration range of liquid samples and conditions of press were also studied.