气相色谱法测定土壤中总石油烃的含量

摘要

The content of total petroleum hydrocarbon(TPH) in soil was determined by ultrasonic, extraction and gas chromatography. The correlation coefficients of C6~C9, C10~C40 were 0.999 and 0.998 respectively. Methods detection limit were 2.9 mg/kg and 0.5 mg/kg respectively. The recovery rate was 95.4 %~102 %, 98.7 %~109 % and the relative standard deviation were 0.84 %~2.70 % and 1.15 %~4.06 % respectively. The method has the characteristics of high sensitivity, high precision and wide applicability.%采用超声-萃取-气相色谱法测定土壤中总石油烃(TPH)的含量,外标法定量.C6~C9、C10~C40线性相关系数R2分别是0.999、0.998,方法检出限分别为2.9mg/kg、0.5 mg/kg,加标回收率分别是为95.4%~102%、98.7%~109%,相对标准偏差分别为0.84%~2.70%、1.15%~4.06%.此方法灵敏度、精密度高以及适用范围广等特点.