苏码罐采样和气袋采样-预浓缩/气相色谱-质谱法测定填埋气体中4种恶臭物质的研究  

Determination of Four Malodorous Substances in Landfill Gas by Sumar Tank Sampling and Gas Bag Sampling Preconcentration/GC-MS

作　　者：李玲 LI Ling

机构地区：[1]四川国测检测技术有限公司

出　　处：《节能与环保》2021年第7期90-92,共3页

摘　　要：通过气袋采样-苏码罐转移-预浓缩-GC/MS法和苏码罐-预浓缩-GC/MS法测定填埋气中恶臭物质。结果表明:4种恶臭物质进行定量,相对响应因子均<20%,进样量为50ml时,方法检出限为0.3~0.6ug/m^(3),方法精密度在0.51%~4.34%之间,加标回收率为93.4%~107%之间。用2种采样方法分别采集的6个样品用预浓缩-GC/MS法进行了检测,结果发现,各物质图谱特征鲜明,定量目标物分离效果好,保留时间重现性好,但气袋采集的硫化物含量低于用苏码罐采集的硫化物含量。因此,苏码罐-预浓缩-GC/MS法测定填埋气中的恶臭物质,采样更简便,操作更便捷,准确度更高,该法的应用可以增强对臭气的监测分析能力。Malodorous substances in landfill gas were determined by gas bag sampling Sumar tank transfer preconcentration GC/MS and Sumar tank preconcentration GC/MS.The results showed that the relative response factors of the four odor substances were less than 20%,the detection limit was 0.3~0.6 UG/m^(3),the precision was 0.51%~4.34%,and the recovery was 93.4%~107%.Six samples collected by the two sampling methods were detected by Preconcentration GC/Ms.the results showed that the spectral characteristics of each substance were distinct,the separation effect of quantitative target substance was good,and the reproducibility of retention time was good,but the sulfide content collected by air bag was lower than that collected by Sumar tank.Therefore,Sumar tank preconcentration GC/MS method for the determination of odor in landfill gas is more simple,convenient and accurate.The application of this method can enhance the ability of odor monitoring and analysis.

关 键 词：苏码罐采样 气袋采样 预浓缩 填埋气 恶臭物质 

分 类 号：O657.63[理学—分析化学] X831[理学—化学]