含油污泥含油率测定方法对比研究

Comparative study of three methods for determination of oil content of oily sludge

采用红外分光光度法、紫外分光光度法和共沸蒸馏法检测含油污泥的含油率。结果表明,共沸蒸馏法适用于大多数含油率的含油污泥,检出限最低,为0.57~2.28 mg/L;紫外分光光度法仅能测得226.0 nm和257.5 nm波长处有特征吸收的石油烃,而相对偏差最低,分别为226.0 nm处1.47%和257.5 nm处1.60%;红外分光光度法常用于检测土壤水与土壤中的石油烃,只能测得波数为2930,2960,3030 cm^(-1)处的特征吸收峰。

The oil content of oily sludge was determined by infrared spectrophotometry,ultraviolet spectrophotometry and azeotropic distillation.The results showed that the azeotropic distillation method was suitable for most oily sludge with oil content,and the detection limit was the lowest 0.57~2.28 mg/L.The UV spectrophotometry can only detect petroleum monsters with characteristic absorption at wavelengths of 226.0 nm and 257.5 nm,with the lowest relative deviation of 1.47%at 226.0 nm and 1.60%at 257.5 nm,respectively.Infrared spectrophotometry is often used to detect soil water and petroleum in soil,and can only measure characteristic absorption peaks at wave numbers of 2930,2960 cm^(-1)and 3030 cm^(-1).