液化石油气中二甲醚的气相色谱分析

建立了利用填充柱测定液化石油气中二甲醚含量的气相色谱方法。采用水浴完全气化样品,气体进样六通阀进样,热导池检测器检测。定量标准曲线的相关系数大于0.999,最低检测限(S/N=3)为0.8%(V/V),该方法简便快速,已成功地应用于液化石油气样品的测定。

Determination of Dimethyl Ether in Liquefied Petroleum Gas

An analytical method was established for dimethyl ether in liquefied petroleum gas by gas chromatograph（GC） with packed column. Thermostatic waterbath GC condition was examined with SC-3000 gas chromatographic apparatus, sixway valve gas sampler and thermal conductivity cell detector. The linear correlation coefficeents for dimethyl ether were higher than 0.999 and detection limits（at signal-to-noise of 3：1）were 0.8 %（V/V）, the method was easy and fast to achieve an accurate determination of the liquefied petroleum gas.