红外分光光度法测定处理后油气田含油污泥中石油类

建立了红外分光光度法测定油气田含油污泥中石油类的方法,并对方法中提取频率和时间、提取次数、硅酸镁吸附方式及填充高度、空白试验的制备进行优化。实验结果表明,方法检出限为0.02 mg/g,空白加标样品测定的精密度在2.2%~8.9%之间,加标回收率在92.5%~100%之间;实际样品测定相对标准偏差在2.4%~8.9%之间,加标回收率在88.2%~104%之间。本方法前处理操作简单,样品用量较少,测定结果的准确度和精密度较好,检出限低,可适用于处理后油气田含油污泥中石油类的准确测定。

Determination of petroleum in treated oil and gas field oily sludge by infrared spectrophotometry

The extraction frequency and time,extraction times,adsorption mode of magnesium silicate,filling height and preparation of blank test were optimized.The experimental results showed that the detection limit of the method was 0.02mg/g,the precision of blank sample ranged from 2.2%to 8.9%,the recovery ranged from 92.5%to 100%;the relative standard deviation of actual sample ranged from 2.4%to 8.9%,the recovery ranged from 88.2%to 104%.The method has the advantages of simple pretreatment,less sample consumption,good accuracy and precision,and low detection limit.