罐采样-气相色谱法测定秸秆沼气的组分

Study on Determination of Straw Biogas Components by Tank Sampling-gas Chromatography

建立了罐采样/气相色谱法测定秸秆沼气组分的分析方法。用内壁惰化处理的不锈钢苏玛罐采集样品,能够保证样品的有效性和代表性。使用五柱串联四阀双TCD气相色谱进行组分的分离检测,结果表明,该方法对组分的分离度良好,测定结果的RSD均小于1%,回收率为92.0%~107.3%,有较好的精密度和准确度,能够满足沼气组分的检测。

A method for determination of straw biogas components by tank sampling and gas chromatography was established.Collection of samples in stainless steel suma tanks with inerted inner walls can ensure the validity and representativeness of the samples.Five-column series four-valve double-TCD gas chromatography was used to separate and detect the components.The experimental results showed that the method had good separation degree of components.The RSD of the determination results were less than 1%,and the recovery rate was from 92.0%to 107.3%.It has good precision and accuracy,and can meet the detection of biogas components.