光学法和热光反射法测量黑碳的比较  

MEASUREMENT OF BLACK CARBON(BC)BY AN OPTICAL METHOD AND A THERMAL-OPTICAL METHOD:INTERCOMPARISON FOR THREE DIFFERENT TYPES OF SAMPLES

作　　者：穆燕[1] 秦小光[1] 张磊[1] 

机构地区：[1]中国科学院地质与地球物理研究所新生代地质与环境重点实验室,北京100029

出　　处：《第四纪研究》2014年第3期676-682,共7页Quaternary Sciences

基　　金：国家自然科学基金项目(批准号:41172158;40472094和40024202);国家重点基础研究发展规划项目(973项目)(批准号:2010CB950200);中国科学院战略重点研究项目(批准号:XDA05120502);中国科学院知识创新工程项目(批准号:KZCX2-YW-Q1-03)共同资助

摘　　要：光学法和热光反射法(TOR)是黑碳含量测量中比较常用的方法,目前主要用于气溶胶的黑碳分析中。本研究选取3种不同性质的样品,包括炭屑、黄土沉积物及气溶胶,分别采用两种方法进行测量,对比所得结果:1)对于炭屑样品,用热光反射法所得黑碳BC_(TOR)约等于22倍光学方法所得黑碳结果BC_(OT21),对于黄土样品,BC_(TOR)是BC_(OT21)的4.5倍,对于黑碳气溶胶,BC_(TOR)≈BC_(OT21);2)不同样品中黑碳组分不同造成的颗粒粒径大小变化,可能是BC_(TOR)/BC_(OT21)比值变化的主要原因;3)用光学法和TOR两种方法测量黑碳含量,对比两种方法所得结果,可以获得更为可靠的黑碳记录。Optical method and thermal/optical reflectance method （TOR）were common used in black carbon （BC） measurement of aerosol. In our study, three different types of samples, including charcoal, loess sediment and aerosol,were used to measure their BC content by two methods, respectively. The results were： （1）For charcoal sample,BCToR which was measured by TOR was nearly 22 times higher than BCoT2, measured by Optical method. For loess sample, BCTOR ≈ 4. 5 BCoT21 , and for BC aerosol samples, BCTOR≈ BCoT21 ; （2） For different type of sample,the variety of grain size caused by BC component might be the main reason causing the change of BCToa/ BCOT21 ; （3） Optical method and TOR method should be used in BC measurement of the same loess sample. The more reliable results would be obtained after the comparison of the results of two methods.

关 键 词：黑碳 光学法 热光反射法 炭屑 

分 类 号：P578.16[天文地球—矿物学] P631.32[天文地球—地质学]