荧光光度法测定地表水、地下水及废水中石油类样品的方法优化

改进了利用荧光分光光度计测定水质石油类样品的分析方法.水质石油样品采用正己烷提取,经硅酸镁净化后使用荧光分光光度计检测.经过优化,方法曲线线性在0.999以上,检出限为0.007 mg/L.经过3种地表水、1种地下水以及2种工业废水的验证,回收率为87.5％～110.0％.分别使用紫外法、红外法与荧光光度法进行比对,地...

Optimization of Determination of Petroleum Samples in Surface Water,Groundwater and Wastewater by Fluorescence Spectrophotometry

The analytical method for the determination of petroleum samples in water by fluorescence spectrophotometry was improved. The petroleum samples in water was extracted with n-hexane, purified by magnesium silicate, and detected using a fluorescence spectrophotometer. Under optimal conditions, the calibration curve of the method showed good linearity, the correlation coefficient was 0.999, and the detection limit was 0.007 mg/L. The method has been applied to determinate petroleum samples collected from different factory surface water and groundwater. The average spiked recoveries were among 87.5%~110.0%. Comparing ultraviolet and infrared methods with fluorescence spectrophotometry, the relative deviation of surface water and groundwater was 5.3%~13.3%, and the wastewater was 1.7%~19.5%. The improved method is accurate and sensitive, and can be used as a supplement, to the petroleum samples in water monitoring standard system.