大气中挥发性有机物在线监测系统

CORC > 北京大学 > 环境科学与工程学院

	大气中挥发性有机物在线监测系统; Online monitoring system for volatile organic compounds in the atmosphere
	刘兴隆 ; 曾立民 ; 陆思华 ; 于雪娜
刊名	环境科学学报
	2009
关键词	挥发性有机化合物低温捕集在线监测气相色谱-质谱仪 VOCs cryn-trapping online monitoring GC-FID/MS
英文摘要	一种新型的监测大气中挥发性有机物(包括含氧挥发性有机物)的在线监测系统被研制,即将超低温冷阱捕集-热解析装置与气相色谱-质谱仪联用.其分析方法是大气样品经除水、除O_3后以60 mL·min~(-1)的流速通过温度为-150℃的超低温冷阱捕集5min,然后样品在110℃下解析后进入GC-FID/MS系统进行分析,时间分辨率为1h.系统使用混和标气进行标定.目标化合物定量曲线的R~2值为0.9137～0.9998,相对标准偏差(RSD)均小于10%.将系统与相关商业化的VOC在线监测仪器进行比对,对于相同目标化合物进行分析,其相关系数r在0.7412～0.9620之间.; A new online monitoring system for atmospheric volatile organic compounds, including oxygenated volatile organic compounds, was developed with a combination of cryo-trapping-thermal desorption and GC-FID/MS ( Gas chromatography-Flame Ionization Detector/Mass Spectrometry). Water and ozone were removed to avoid interference. Ambient air was collected with an air flow rate of 60 mL. min~(-1) at-15℃ for S minutes, then the sample was desorbed by beating to 110℃ and the volatile organic compounds were detected by GC-FID/MS. The time resolution is 1 h. The system was calibrated with multi-component standards. The calibration results indicated good regression results for target compounds with R~2 = 0. 9137 -0. 9998 and relative standard deviation ( BSD% )below 10%. The newly developed system showed a similar variation of VOC species concentrations to those currently used incommercial online instruments, and the correlation coefficients (r) ranged between 0. 7412 and 0. 9620.; 国家高技术研究发展计划(863计划); 中文核心期刊要目总览(PKU); 中国科技核心期刊(ISTIC); 中国科学引文数据库(CSCD); 0; 12; 2471-2477; 29
语种	中文
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/4570]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	刘兴隆,曾立民,陆思华,等. 大气中挥发性有机物在线监测系统, Online monitoring system for volatile organic compounds in the atmosphere[J]. 环境科学学报,2009.
APA	刘兴隆,曾立民,陆思华,&于雪娜.(2009).大气中挥发性有机物在线监测系统.环境科学学报.
MLA	刘兴隆,et al."大气中挥发性有机物在线监测系统".环境科学学报 (2009).