四极质谱仪在空气中七种常量微量组分在线监测中的应用  

On-line monitoring seven normal and trace amount components in air by quadrupole mass spectrometer.

作　　者：李芳[1] 张玉广[1] 陆平[1] 凌大鹏[1] 陈宁[1] 严奉轩[1] 

机构地区：[1]中国船舶重工集团公司第七一八研究所,邯郸056027

出　　处：《分析仪器》2007年第4期20-23,共4页Analytical Instrumentation

摘　　要：采用GAM 300四极质谱仪对空气中的氧气、氮气、二氧化碳、正庚烷、苯、甲苯、三氯甲烷等七种常量微量物质进行了在线测定。对仪器的进样系统作了优化。苯等微量组分的检出限达到40μg/m^3。讨论了质谱测量参数(检测器电压、测量时间、放大器调整间隔时间)对测量准确度的影响。Seven normal and trace amount components （oxygen, nitrogen, carbon dioxide, heptane, toluene and trichloromethane） in air were analyzed on-line simultaneously by using a GAM 300 quadrupole mass spectrometer. The sample inlet system of the insrument was optimized. The detection limits of benzene and other trace amount components can reach 40μg/m^3. The influences of mass spectrometric parameters （such as detector voltage, measuremet time and time interval for amplifier adjustment） on measurement accuracy are discussed.

关 键 词：四极质谱 在线检测 苯 

分 类 号：TH843[机械工程—仪器科学与技术]