中心切割技术在环境空气挥发性有机物监测中的应用  

Application of Center Cutting Technology in Monitoring Volatile Organic Compounds in Ambient Air

作　　者：吴际 WU Ji(Bengbu Ecological and Environmental Monitoring Center of Anhui Province,Bengbu 233040,China)

机构地区：[1]安徽省蚌埠生态环境监测中心,安徽蚌埠233040

出　　处：《中国资源综合利用》2023年第6期65-68,共4页China Resources Comprehensive Utilization

摘　　要：为更好地开展环境空气中挥发性有机物(VOCs)的监测,本研究采用苏玛罐采样-空气预浓缩仪连接气质联用仪,通过中心切割技术利用双柱双检测器实现一针进样,分析环境空气中的57种VOCs。57种VOCs校准曲线的线性相关系数在0.996 2~0.999 9,实验室检出限在0.01~0.03 nmol/mol,2 nmol/mol VOCs标气试验测定的相对标准偏差在0.5%~8.2%,方法性能满足相关技术规范要求。In order to better monitor volatile organic compounds(VOCs)in the ambient air,this study uses a Suma tank sampling-air preconcentration instrument connected to a gas chromatography-mass spectrometry instrument,and uses center cutting technology to achieve one needle injection using dual columns and dual detectors to analyze 57 VOCs in ambient air.The linear correlation coefficient of the calibration curves for 57 VOCs is 0.9962~0.9999,and the laboratory detection limit is 0.01~0.03 nmol/mol,the relative standard deviation measured by the 2 nmol/mol VOCs standard gas test is 0.5%~8.2%,and the method performance meets the requirements of relevant technical specifications.

关 键 词：中心切割技术 环境空气 挥发性有机物 

分 类 号：X831[环境科学与工程—环境工程]