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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 and thermal light reflectometry (TOR) is a more commonly used method for the measurement of black carbon and is currently used mainly for aerosol black carbon analysis. In this study, three different types of samples, including carbonaceous loess, loess sediments and aerosols, were selected and measured by two methods respectively. The results were compared with the results obtained: 1) For carbonaceous samples, TOR) is about 22 times of that obtained by the optical method BC_ (OT21). For loess samples, BC_ (TOR) is 4.5 times that of BC_ (OT21) and BC_ (TOR) ≈BC_ (OT21) for black carbon aerosols. 2) The change of particle size caused by the different carbon black components in different samples may be the main reason for the change of BC_ (TOR) / BC_ (OT21) ratio; 3) The black carbon content is measured by optical method and TOR method, Comparing the results of the two methods, a more reliable black-carbon record can be obtained.