自动二级热脱附-单色谱柱-气相色谱质谱联用测定环境空气中臭氧前驱物的研究  

Automatic monitoring of ozone precursors in ambient air based on a two-staged adsorption/thermal desorption-single column-gas chromatography/mass spectrometry system

作　　者：杨建虎 李少华 钟琪[2] 崔延青 王强 高超 Yang Jianhu;Li Shaohua;Zhong Qi;Cui Yanqing;Wang Qiang;Gao Chao(Hebei Sailhero Environmental Protection Hi-tech.,Ltd.,Shijiazhuang 050035,China;China National Environmental Monitoring Centre,Beijing 100012,China)

机构地区：[1]河北先河环保科技股份有限公司,石家庄050035 [2]中国环境监测总站,北京100012

出　　处：《分析仪器》2018年第4期34-41,共8页Analytical Instrumentation

基　　金：国家重点研发计划"环境空气臭氧前驱体及光化学烟雾在线监测仪开发及应用示范"(2017YFF0108300)

摘　　要：针对国内日益突出的臭氧污染问题,研制了基于二级热脱附-单色谱柱-气相色谱/质谱(GC/MS)原理的臭氧前驱物自动监测系统,并评价了该系统的各项技术指标,结果表明:56种臭氧前驱物在单根色谱柱上能实现较好地分离分析,各目标组分检出限均低于0.15×10-9 mol/mol,精密度RSD小于3%,线性相关系数R2达到0.995以上。仪器的性能,如保留时间的稳定性,满足环境空气长期自动监测和目标物定性识别要求。In response to the pollution problem brought from increasing ozone in China, a two-staged adsorption/thermal desorption-single column-gas chromatography/mass spectrometry（GC/MS） auto- monitoring system was developed for monitoring ozone precursors. The results indicated that all 56 compounds were with good resolution using only a single chromatograph column. The method detection limits （MDLs） were lower than 0.15 × 10-9 mol/mol, and the reproducibility based on relative standard deviations of the target gas mixtures were below 3%. Moreover, the correlation coefficient R2 was larger than 0. 995. The instrumental performances, such as the stability of retention times, could meet the requirements for auto-monitoring of ambient air in long terms and qualitative identification of the target object.

关 键 词：二级热脱附 GC/MS 臭氧前驱物 自动监测 

分 类 号：O657.63[理学—分析化学] X831[理学—化学]