气相色谱法测定修正类产品中10种苯类溶剂残留量

GC Determination of 10 Benzene-Homologous Solvents in Correctives

采用气相色谱法测定修正类产品中10种苯类溶剂的残留量。修正类产品样品用乙酸乙酯超声提取30min,用DB-WAX毛细管色谱柱（30m×0.32mm,0.25μm）分离,火焰离子化检测器检测。10种化合物的质量浓度均在0.20~100.0mg·L-1范围内与其信号强度呈线性关系,方法的测定下限（10S/N）在1.8~2.1mg·kg^-1之间。以空白样品为基体进行加标回收试验,所得回收率在90.3%~113%之间,测定值的相对标准偏差（n=6）在1.8%~6.1%之间。

GC was applied to the determination of 10 benzene-homologous solvents in correctives. The sample of corrective was extracted ultrasonically with ethyl acetate for 30 min. The analytes in the extract were separated on DB-WAX capillary chromatographic column （30 m×0.32 mm, 0.25 μm） and detected by FID. Linear relationships between values of signal intensity and mass concentration of the 10 solvents were kept in the same range of 0.20-100.0 mg·L-1, with lower limits of determination （10S/N） in the range of 1.8-2.1 mg·kg^-1. On the base of blank sample, test for recovery was made by standard addition method; values of recovery found were in the range of 90.3%-113%, with RSD′s （n=6） in the range of 1.8%-6.1%.