无组织废气中酚类化合物测定的比较实验

Comparative experiment on determination of phenolic compounds in unorganized waste gas

在环境监测领域,不同污染源废气中酚类化合物的浓度大小不同,有的接近检出限,有的甚至高于方法测定上限;酚类化合物的干扰物质也不同,有的干扰较为明显,而有的基本没有干扰,实际工况的复杂性,导致分析人员在选择分析方法时,往往存在一定偏差,最终导致数据结果的不准确性。根据废气的排放形式,酚类化合物样品大致分为有组织排放样品和无组织排放样品两类。该实验依据标准方法,通过无组织直接比色法和无组织萃取比色法对一组无组织排放样品及标准样品进行比较实验,探讨如何更准确分析出无组织废气中酚类化合物样品的浓度。

In the field of environmental monitoring, the concentration of phenolic compounds in the exhaust gas of different pollution sources is different, some are even higher than the upper limit of the method, and some are close to the detection limit. The interfering substances of phenolic compounds are also different. Some interferences are more obvious. Some have basically no interference. The complexity of the actual working conditions often causes analysts have certain deviations when choosing analysis methods, which ultimately leads to inaccuracy of data results. According to the emission form of exhaust gas, phenolic compound samples are roughly divided into two types: organized emission samples and unorganized emission samples. According to standard methods, this experiment compares a set of fugitive emission samples and standard samples through unorganized direct colorimetry and unorganized extraction colorimetry, and explores how to more accurately analyze the concentration of phenolic compounds in unorganized waste gas.