气相色谱-硫化学发光检测器法测定车用汽油中6种硫醚

GC Determination of 6 Sulfoethers in Motor Gasoline with Sulfur Chemiluminescence Detector

摘要: 采用气相色谱测定车用汽油中6种硫醚的含量。用DB-1毛细管色谱柱(60 m×0.32 mm,0.50 μm)分离和硫化学发光检测器检测。6种硫醚的质量浓度均在0.5~150 mg·L-1范围内与其峰面积呈线性关系,方法的检出限(3S/N)在0.03~0.26 mg·kg-1之间。方法用于车用汽油的分析,加标回收率在76.6%~120%之间,测定值的相对标准偏差(n=7)在0.50%~6.4%之间。

Abstract: GC was applied to the determination of 6 sulfoethers in motor gasoline. The analytes were separated on DB-1 capillary chromatographic column (60 m×0.32 mm,0.50 μm) and detected by sulfur chemiluminescence detector. Linear relationships between values of peak area and mass concentration of the 6 sulfoethers were kept in the same range of 0.5-150 mg·L-1,with detection limits (3S/N) in the range of 0.03-0.26 mg·kg-1. The proposed method was applied to the analysis of samples of motor gasoline,giving values of recovery and RSD′s (n=7) in the ranges of 76.6%-120% and 0.50%-6.4%,respectively.