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沸点低于230℃的酚为挥发性酚,毒性大,是水质监测的一个重要指标。酚主要存在于钢铁工业的焦化厂,城市煤气厂,石油化工产品厂废水中,炼焦过程所产生的污水,含有大量酚、氨、氯化物、焦油等杂质。本文研究焦化厂排污水含酚量的测试方法。导数吸光光度法,具有高选择性和高灵敏度等特点。Talsky等人曾简单报导过用导数光度法测定废水中的苯胺和酚,本文详细讨论了导数光度法对酚的定量测定方法,与常规标准方法比较,结果十分接近,而方法简便,不需要特殊试剂。可在吸收光谱有干扰的情况下,在波长285～240nm范围内作四阶导数谱直接测定其含量。线性范围宽,在100毫克·升~(-1)以内呈线性,检测限为0.06毫克·升~(-1)。
Phenols with a boiling point of less than 230 ° C are volatile phenols and are highly toxic and are an important indicator of water quality monitoring. Phenol mainly exists in the iron and steel industry coking plant, city gas plant, petrochemical products plant wastewater, coking wastewater generated by the process, contains a large amount of phenol, ammonia, chloride, tar and other impurities. This paper studies coking plant wastewater effluent phenol content of the test method. Derivative absorbance spectrophotometry, with high selectivity and high sensitivity and so on. Talsky et al. Have briefly reported the determination of aniline and phenol in wastewater by using derivative spectrophotometry. This article discusses the quantitative determination of phenol by derivative spectrophotometry in detail. Compared with the conventional standard methods, the results are very close, and the method is simple and requires no special Reagents. In the case of interference with the absorption spectrum, in the wavelength range of 285 ~ 240nm for fourth-order derivative of the direct determination of its content. The linear range is linear and the linear range is within 100 mg · L -1. The detection limit is 0.06 mg · L -1.