Comparative analysis of new observation methods for carbonaceous aerosol (OC/EC)
NI Deng-feng1,2, LIN Jing-jing3, GAO Jian1, XIE Jing-fang2, WANG Jie4, GUO Ying-zhe5, REN Jian-ning1
1. Chinese Research Academy of Environmental Sciences, Beijing 100012, China; 2. College of Environmental & Resource Sciences, Shanxi University, Taiyuan 030006, China; 3. Shandong Provincial Eco-environment Monitoring Center, Jinan 250101, China; 4. Department of Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China; 5. Environment Research Institute, Shandong University, Qingdao 266237, China
Abstract：Based on two protocol analysis methods, Thermo-light reflection method (IMPROVE A) and Thermo-optical transmission method (RT-Quartz), and the new OC/EC analysis method, comparative analysis of carbonaceous aerosol content in Jinan was held in this study. The results show that the protocol methods may lead to overestimation or underestimation of the carbonaceous aerosol mass concentration due to the analysis definition during OC/EC observation process, furthermore, the membrane sampling system made the offline OC about 1.65times online. Compared with the two protocol methods, the new OC/EC measurement method does eliminate the errors that may be caused by principle and environmental parameters (such as VOCs), and has certain advantages in the measurement of OC/EC/TC. With more accuracy, stability and practicality in practical operation, the new method will be more suitable for long-term commercial online measurement of OC/EC in particles.
Barbara J. Turpin, Pradeep S, Elisabeth A. Measuring and simulating particulate organics in the atmosphere:problems and prospects[J]. Atmospheric Environment, 2000,34(18):2983-3013.
[2]
Polidori A, Turpin B J, Ho-Jin L, et al. Local and Regional Secondary Organic Aerosol:Insights from a Year of Semi-Continuous Carbon Measurements at Pittsburgh[J]. Aerosol Science and Technology, 2006,40(10):861-872.
[3]
Gray H A, Cass G R, Huntzicker J J, et al. Characteristics of atmospheric organic and elemental carbon particle concentrations in Los Angeles[J]. Environmental Science & Technology, 1986,20(6):580-589.
[4]
Bond T C, Bergstrom R W. Light Absorption by Carbonaceous Particles:An Investigative Review[J]. Aerosol Science and Technology, 2006,401(1):27-67.
[5]
王莉华,董华斌,闫才青,等.气溶胶OC/EC切割点确定方法改进及应用[J]. 环境科学, 2012,33(9):32-38. Wang L H, Dong H B, Yan C Q, et al. Improvement and application of aerosol OC/EC cutting point determination method[J]. Environment Science, 2012,33(9):32-38.
[6]
姜文娟,郭照冰,刘凤玲,等.南京地区大气PM1.1中OC、EC特征及来源解析[J]. 环境科学, 2015,36(3):774-779. Jiang W J, Guo Z B, Liu F L, et al. Characteristics and sources of OC/EC in PM1.1in Nanjing[J]. Environment Science, 2015,36(3):774-779.
[7]
Alves N D O, Brito J, Caumo S, et al. Biomass burning in the Amazon region:Aerosol source apportionment and associated health risk assessment[J]. Atmospheric Environment, 2015,120(11):277-285.
[8]
Chow, Judith C, Watson, et al. The DRI thermal/optical reflectance carbon analysis system:description、evaluation and applications in U.S. Air quality studies[J]. Atmos Environ A, 1993,27(8):1185-1201.
[9]
Chow, Judith C, Watson, et al. Equivalence of Elemental Carbon by Thermal/Optical Reflectance and Transmittance with Different Temperature Protocols[J]. Environmental Science & Technology, 2004,38(16):4414-4422.
[10]
Chen L W A, Chow J C, Watson J G, et al. Modeling reflectance and transmittance of quartz-fiber samples containing elemental carbon particles:Implications for thermal/optical analysis[J]. Journal of Aerosol Science, 2004,35(6):0-780.
[11]
Park S S, Bae M S, Schauer J J, et al. Evaluation of the TMO and TOT methods for OC and EC measurements and their characteristics in PM2.5 at an urban site of Korea during ACE-Asia[J]. Atmospheric Environment, 2005,39(28):5101-5112.
[12]
郇宁,曾立民,邵敏.气溶胶中有机碳和元素碳分析方法进展[J]. 北京大学学报(自然科学版), 2005,41(6):957-964. Huan N, Zeng L M, Shao M.Advances in analytical methods for organic and elemental carbon in aerosols[J]. Journal of Peking University (Natural Science Edition), 2005,41(6):957-964.
[13]
庞博,吉东生,刘子锐,等.大气细颗粒中有机碳和元素碳监测方法对比[J]. 环境科学, 2016,37(4):54-63. Pang B, Ji D S, Liu Z R, et al. Comparison of monitoring methods of organic carbon and elemental carbon in fine particles in the atmosphere[J]. Environment Science, 2016,37(4):54-63.
[14]
胡敏,邓志强,王轶,等.膜采样离线分析与在线测定大气细粒子中元素碳和有机碳的比较[J]. 环境科学, 2008,29(12):3297-3303. Hu M, Deng Z Q, Wang Y, et al. Comparison of offline analysis of membrane sampling and online determination of elemental carbon and organic carbon in fine particles in the atmosphere[J]. Environment Science, 2008,29(12):3297-3303.
[15]
Khan, Bernine, Hays, et al. Differences in the OC/EC Ratios that characterize ambient and source aerosols due to thermal-optical analysis[J]. Aerosol Science & Technology, 2012,46(2):127-137.
[16]
Bauer, Jace J, Yu, et al. Characterization of the Sunset Semi-Continuous Carbon Aerosol Analyzer[J]. Air Repair, 2009,59(7):826-833.
[17]
Wu, Cheng, Ng, et al. Determination of elemental and organic carbon in PM2.5 in the Pearl River Delta Region:Inter-instrument (Sunset vs. DRI Model 2001 thermal/optical carbon analyzer) and inter-protocol comparisons (IMPROVE vs. AC)[J]. Aerosol Science & Technology, 2012,46(6):610-621.
[18]
陈魁,银燕,魏玉香,等.南京大气PM2.5中碳组分观测分析[J]. 中国环境科学, 2010,30(8):9-14. Chen K, Yin Y, Wei Y X, et al. Observation and analysis of carbon components in PM2.5 in Nanjing[J]. China Environment Science, 2010,30(8):9-14.
[19]
范雪波,刘卫,王广华,等.杭州市大气细颗粒物浓度及组分的粒径分布[J]. 中国环境科学, 2011,31(1):13-18. Fan X B, Liu W, Wang G H, et al. Concentration of fine particles and particles size distribution of components in Hangzhou[J]. China Environment Science, 2011,31(1):13-18.
[20]
申永.气溶胶碳成分测量中热光透射法和反射法对比研究[D]. 合肥:中国科学院合肥物质科学研究院, 2011. Shen Y. Comparative study of thermal-optical transmission method and emission method in aerosol carbon composition measurement[D]. Hefei Institute of Material Science, Chinese Academy of Sciences, 2011.
[21]
Steven Brown, Hilary Minor, Theresa O, et al. Review of sunset OC/EC instrument measurements during the EPA's sunset carbon evaluation project[J]. Atmosphere, 2019,10(5):287-309.
[22]
刘琼玉,谈静,钟章雄,等.PM2.5中OC/EC测定的离线分析法与在线分析法比较[J]. 中国环境监测, 2019,35(4):123-130. Liu Q Y, Tan J, Zhong Z X, et al. Comparison of offline analysis method and online analysis method for OC/EC determination in PM2.5[J]. China Environment Monitoring, 2019,35(4):123-130.
[23]
黄睿,谈静,刘琼玉.PM2.5中有机碳/元素碳测定探讨[J]. 江汉大学学报(自然科学版), 2016,141(1):12-18. Huan R, Tan J, Liu Q Y. Study on determination of organic carbon/elemental carbon in PM2.5[J]. Journal of Jianghan University (Natural Science Edition), 2016,141(1):12-18.
[24]
丁晴,刘建国,陆亦怀,等.大气有机碳/元素碳在线分析仪的研制[J]. 仪器仪表学报, 2014,35(6):1246-1253. Ding Q, Liu J G, Lu Y H, et al. Development of on-line organic carbon/elemental carbon analyzer[J]. Journal of Instrumentation, 2014,35(6):1246-1253.
[25]
薛瑞,曾立民,吴宇声,等.大气气溶胶碳质组分在线分析仪的研制和应用[J]. 环境科学学报, 2017,37(1):95-103. Xue R, Zeng L M, Wu Y S, et al. Development and application of an on-line carbonaceous aerosol analyzer[J]. Acta Science Circumstantiae, 2017,37(1):95-103.
[26]
Judith C, Chow, John G, et al. Comparison of improve and NIOSH carbon measurements[J]. Aerosol Science & Technology, 2010,34(1):23-34.
