X射线荧光光谱法测定原油中的有机氯

Determination of organochlorine in crude oil by X-ray fluorescence spectrometry

采用X射线荧光光谱法分析原油中的有机氯含量。把原油与乙醇–水混合离心洗脱无机氯,测量有机氯的计数率,拟合有机氯含量与计数率的关系,有机氯含量与计数率的线性相关系数为0.9993,方法的检出限为0.55 mg/kg,加标回收率为90.90%~106.25%,测定结果的相对标准偏差不大于10.33%(n=6)。该方法可以作为测定原油有机氯含量的新方法。

The method for the determination of organic chlorine in crude oil by X-ray fluorescence spectrometry were established.The crude oil and alcohol water were mixed to centrifugally elute inorganic chlorine,the counting rate of organic chlorine was measured,which was linear with the organic chlorine content,the linear coefficient was 0.9993.The detection limit of the method was 0.53 mg/kg,the recovery rate of spiking was 90.90%–106.25%,and the relative standard deviation of the determination results was not more than 10.33%(n=6).This method can be used as a new test method for determining the organic chlorine content of crude oil.