气相色谱法测定空气中苯、甲苯和邻二甲苯  

GAS-CHROMATOGRAPHIC DETERMINATION OF BENZENE TOLUENE AND o-XYLENE IN AIR

作　　者：李宣[1] 江丽媛[1] 李孟仁[1] 王进 

机构地区：[1]深圳出入境检验检疫局,深圳518045 [2]深圳长园新材料股份有限公司,深圳518057

出　　处：《理化检验（化学分册）》2005年第12期894-896,899,共4页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

摘　　要：使用3500有机挥发物监控器收集空气中的苯、甲苯和邻二甲苯.建立了气相色谱测定法.方法简单,快速,苯、甲苯和邻二甲苯的检出限小于OSHA允许限量的1/30,回收率为90.8%～99.7%,相对标准偏差为0.40%～0.63%.The 3500 organic vapour monitor was used as a new device to collect air samples containing benzene, toluene and o-xylene. Gas chromatography was applied to the determination of these 3 compounds. Capillary chromatographic column （HP-1 19091Z-413, 30 m × 0. 32 mm, 0.25μm） was used and other chromatographic parameters were given in detail. Good linearity between the concentration of the 3 compounds and their peak areas were obtained. Detection limits （S/N=3） were found to be 0.30, 0. 14 and 0.85 ng for benzene, toluene and o-xylene respectively. RSD＇s （n= 11） of the analytical results of the 3 compounds were 0. 40% （for benzene）, 0. 52% （for toluene） and 0. 63% （for o-xylene）, and recoveries were in the range of 90.8% to 99.7%.

关 键 词：气相色谱法 有机挥发物监控器 空气 苯 甲苯 邻二甲苯 

分 类 号：O657.7[理学—分析化学]