二维气相色谱法测定流体包裹体中气相成分

Determination of Gaseous Components in Fluid Inclusion Samples by Two-dimensional Gas Chromatography

建立了双柱、双检测器串联的二维气相色谱测定流体包裹体中气相成分H2、O2、N2、CO、CH4、CO2、H2O、C2H2、C2H6、C3H8的方法。方法经济、易行，灵敏度和精密度高，检出限在10^-4～10^-6（x，摩尔分数），精密度（RSD）小于7％。所获得真实水量与同一缩分样的液相成分离子色谱测定结果相结合，可以得到包裹体溶液中的离子浓度。目前已应用于流体包裹体样品分析，分析结果符合地质研究的要求。

A method for determination of gaseous components in fluid inclusions by two-dimensional gas chromatography was established. The gas chromatograph used in this work consists of double-column （stainless steel with two six-port valves） and double-detector （TCD and FID） connected in series. The gaseous components （H2, O2, N2, CO, CH4, CO2, H2O, C2H2, C2H6, C3H8 ） were extracted from fluid inclusions with thermal decrepitation method and then determined by two-dimensional gas chromatography. The detection limits of the method for the gaseous components are 10^-4 -10^-6（x, mol/mol） with precision of less than 7% RSD（n =6）. The method has been successfully applied to the determination of gaseous components in fluid inclusion samples with the advantages of high sensitivity and accuracy.