大气有机碳／元素碳在线分析仪的研制  

Research and development of an on-line carbonaceous aerosol analyzer

作　　者：丁晴 刘建国[1] 陆亦怀[1] 王亚平[1] 陆钒[1] 石建国[1] 

机构地区：[1]中国科学院安徽光学精密机械研究所中国科学院环境光学与技术重点实验室,合肥230031

出　　处：《仪器仪表学报》2014年第6期1246-1253,共8页Chinese Journal of Scientific Instrument

基　　金：国家863计划(2006AA06A302)资助项目

摘　　要：研究并实现了一种基于热光法原理的大气有机碳(OC)/元素碳(EC)在线分析仪。介绍了热光法原理和工作过程,详细描述了分析仪的组成:分析炉系统、气路系统、激光探测系统、控制系统和检测器。采用内标、外标相结合的方法对分析仪定量,并进行性能测试,结果表明分析仪的精密度为1.5%、最低检测浓度为0.37μgC/m3。深入探讨了影响分析仪性能的关键因素,并提出解决方案。将该分析仪和国外同类仪器于广州亚运会观测实验中进行比对,分析了实验数据。该分析仪性能与国外同类仪器水平相当,能够满足长期稳定、自动连续监测的要求,具有在线监测的特点。An on-line analyzer has been developed for the analysis of organic and elemental carbonaceous aerosol based on thermal-optical method. The measurement principle of the thermal-optical method and the operation of the analyzer are introduced, and the structure of the analyzer is particularly described, which comprises the analysis oven system, the air flow path system, the laser correction system, the control system and the CO2 detector. The internal calibration method combining with the external calibration method was used to calibrate the analyzer, and the performance test was conducted. The results of the calibration and performance test show that the analyzer has good stability and repeatability, with the accuracy of 1.5% and the lowest detection limit of 0.37 μgC/m^3. The key factors influencing the performance of the analyzer was applied to monitor the air quality during the are discussed deeply, and the solution is suggested. The analyzer Guangzhou Asian Games, and compared with the Sunset OC/EC analyzer; and the result was analyzed. The application result shows that the performance of the analyzer is similar to that of the same kind analyzer abroad; and the developed analyzer meets the requirement of long-term stability and automatic continuous monitoring, and has the advantage of on-line monitoring.

关 键 词：热光法 有机碳 元素碳 在线监测 

分 类 号：X851[环境科学与工程—环境工程] TH76[机械工程—仪器科学与技术]