【摘要】 建立了同时测定土壤中23种挥发性氯代烃和苯系物的吹扫捕集-气相色谱-质谱法.优化了试验条件,标准曲线在0.32×10-9～200.0×10-9范围内呈线性关系,方法检出限(3S/N)为0.077×10-9～0.69×10-9,样品标准添加平均回收率86.5%～117.5%,相对标准偏差(n=7)在1.6%～8.2%之间.更多还原

【Abstract】 A method for simultaneous determination for 23 volatile chlorinated hydrocarbons and benzene series in soil samples by gas chromatography-mass spectrometry(GC-MS) with purge and trap pretreatment is introduced.The conditions of purge and trap,the qualification of GC-MS,and the centrifuge are confirmed.Under the best conditions,the liner range of the standard curve is 0.32-200.0 μg/kg.The detection limits range of the method for the 23 volatile organic compounds are 0.077-0.69 μg/kg.The average recoveries are 86.5% to 117.5%,with precision of 1.6%-8.2%(n = 7).This fast and accurate method can be applied to determinate the 23 volatile organic compounds in batch soil samples with satisfactory results.更多还原