【摘要】 为应对突发水质污染,建立高灵敏度的水中N-甲基甲酰胺(NMF)测定方法,采用0.45μm水系滤膜过滤水样后,结合气相色谱-氮磷检测器(GC-NPD)直接进样分析。采用外标法进行定量分析,NMF在0.01～1.0 mg/L具有良好的线性关系,相关系数R~2=0.999 4,方法检出限为0.007 mg/L。在纯水和工业废水样品中,配制3个水平的加标样品,浓度分别为0.05、0.10、0.25 mg/L,其平均回收率在86.5%～120.3%,相对标准偏差为1.63%～8.43%。方法前处理简单高效,灵敏度高,适用于地表水、地下水和工业废水中NMF的测定。更多还原

【Abstract】 In order to cope with emergent water pollution,a highly sensitive gas chromatography( GC) method for the determination of N-Methylformamide( NMF) in water was established. Water samples were filtered by membrane with 0. 45 μm pore size,and then analyzed by GC with NPD detector. External standard method was used for quantitative analysis. NMF had a good linear relationship in the range of 0. 01 ～ 1. 0 mg/L,and correlation coefficient R~2 was 0. 999 4. Detection limit of the method was 0. 007 mg/L. Three standard levels were prepared in pure water and industrial wastewater with concentrations of 0. 05,0. 10 mg/L and 0. 25 mg/L,respectively.Average recovery was 86. 5% ～ 120. 3%,and relative standard deviation was 1. 63% ～ 8. 43%. The method was efficient,sensitive with simple sample preparation. And it’s suitable for the determination of NMF in surface water,groundwater and industrial wastewater.更多还原