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沥青烟气是主要大气污染物之一,目前国内尚无统一的标准方法进行测定,本法应用沥青烟气中所含多种多环芳香烃以及少量氧、氮、硫的杂环混合物(其中包括致癌物3、4—苯(艹并)芘)被环已烷吸收,在255纳米处测其吸光度.与以往沥青烟分析方法相比,本法在制备标样时,采取在现场采样,减少了标样和样品成份差别;采集剂量大,减少了称量引进的系统误差,方法检测下限为0.1微克/毫升,经过7次测定分析结果的标准偏差为0.033,相对标准偏差为0.39.
Asphalt flue gas is one of the major air pollutants. At present, there is no uniform standard method for determination. This method uses many kinds of polycyclic aromatic hydrocarbons contained in bitumen flue gas and a small amount of heterocyclic mixture of oxygen, nitrogen and sulfur Including the carcinogen 3,4-benzene (acenaphtho) pyrene) is cyclohexane absorption measured at 255 nm absorbance.Compared with the previous analysis method of bitumen smoke, this method in the preparation of standard samples taken at the scene, The sampling dose is reduced, the systematic error of weighing is reduced, the detection limit of the method is 0.1 μg / ml, the standard deviation of the analysis result of seven determinations is 0.033, and the relative standard deviation is 0.39.