利用二氯乙烷在水中和甲苯中溶解度的不同萃取二氯乙烷,而后以三氯甲烷为内标物,用内标法测量乙烯利中微量二氯乙烷的含量。二氯乙烷线性回归方程为y=2.1939x+0.05125,相关系数0.9995,方法的回收率为96.1%~105.6%。实验结果表明,该方法具有分析速度快、分析结果准确可靠的优点。 Dichloroethane was extracted by the difference of the solubility of dichloroethane in water and toluene, then the content of trace dichloroethane in ethephon was measured by internal standard method using trichloromethane as internal standard. The linear regression equation of dichloroethane was y = 2.1939x + 0.05125 with a correlation coefficient of 0.9995. The recovery rate of the method was 96.1% -105.6%. Experimental results show that this method has the advantages of fast analysis and accurate and reliable analysis results.