食品级二氧化碳中乙醇含量气相色谱分析方法的研究

Study on Gas Chromatography Analytical Method by Alcohol in Food-Grade Carbon Dioxide

本实验采用气相色谱法分析二氧化碳中的痕量级组分气体——乙醇。主要影响因素有进样口温度、毛细柱温度、检测器温度、毛细柱流速、尾吹,对各项优化后测得精密度为0.6%,线性误差不大于±2%。该方法快速、准确,可应用于该标准物质的分析定值。

The gas chromatography analytical method is used to analyze alcohol trace component in carbon dioxide, the ma- jor influence factors are inlet temperature, oven temperature, detecter temperature, column flow rate, make-up gas, the precision via optimized factors is 0. 6%, the linear errors are no more than ±2%. This method is fast and accurate, can be used in analyzation and value certification of this Certified Reference Material （CRM）.