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根据炼厂污水中含有在紫外光区具特征吸收峰的各系芳烃化合物的特点,采用紫外分光光度法测定芳烃化合物含量来相应地确定污水中微量油品。该法具有操作简单、测定范围广、灵敏度高和准确度较好等优点。对一般炼厂污水,可检出约0.01毫克/升的微量油品。当油的检出浓度～0.1毫克/升时,其绝对误差不大于0.02毫克/升:当检出浓度大于0.5毫克/升时,其平均相对误差一般不大于6％。
According to the characteristics of the aromatic compounds in the refinery wastewater containing the characteristic absorption peaks in the ultraviolet region, the content of the aromatic hydrocarbon compounds was determined by ultraviolet spectrophotometry to determine the trace amount of oil in the sewage. The method has the advantages of simple operation, wide measuring range, high sensitivity and good accuracy. For the general refinery sewage, can detect about 0.01 mg / L of trace oil. When oil is detected at a concentration of ~0.1 mg / L, its absolute error is not greater than 0.02 mg / L: the average relative error is typically not greater than 6% at a detected concentration of greater than 0.5 mg / L.