密闭舱室内几种主要目标污染物的定量测量

The Quantitative Measurement of Several Main Contaminants in Sealed Cabin.

目的建立 6种飞船目标污染物甲醇、乙醇、乙二醇、乙酸、丙酮、苯的分离和检测方法。方法通过实验选择最佳的气相色谱分离条件 ,使用保留时间定性、外标法定量同时测定 6种载人航天器目标污染物 ,并采用 5点法校正。结果选择 30 .0 0m× 0 .2 5 μm× 2 5 0 μm的非极性毛细管柱 ,初始炉温 - 30℃ ,以 4℃ /min的速度升至 80℃ ,6℃ /min升至 1 5 0℃ ,1 0℃ /min升至 2 5 0℃并保持 5min。火焰离子化检测器温度为 2 0 0℃ ,选择分流模式进样 ,进样口温度为 1 5 0℃。校正曲线的线形相关性较好 ,方法的精密度较高。结论在最佳实验条件下 6种目标污染物的色谱峰能够完全分开 ,保证了同时对 6种污染物进行准确地定性和定量分析。实验结果表明 ,这种色谱分析方法简便、快速、准确。

Objective To establish a standardized analytical method of chromatography used for separating and determining six target contaminants including methyl alcohol,ethanol,glycol,acetic acid,acetone and benzene in space cabin simultaneously. Method Optimal separating and examining conditions were determined through experiments by gas chromatography. Retention time was used to determine the nature of contamination and the method of extended standard to quantify accurately the six mixed contaminants.The method of five point calibration was used. Result Non polar capillary GC column (30.00 m×0.25 μm×250 μm)was selected.Oven temperature was -30℃ initially and then hoisted to 80℃ at a rate of 4℃/min, to 150℃ at 6℃/min , to 250℃ at 10 ℃/min and kept for 5 min. The temperature of flame ionization detector was 200℃and that of back inlet adopting split mode was 150℃. The linear correlation of calibration curve was satisfied and the precision of this method was high. Conclusion Under optimal experimental conditions the chromatographic peaks of six contaminants were separated so completely that they were quantified accurately simultaneously. The results showed this method was simple,quick and accurate.