应用气固顶空-气相色谱法测定卫生护垫、纸尿裤、卫生巾等一次性卫生用品中残留环氧乙烷的含量。样品经剪碎后,在60 ℃下加热30 min,并取顶空气体进气相色谱以氢火焰离子化检测器进行检测。以基体匹配校正法有效消除基质效应。在卫生护垫、纸尿裤、卫生巾基质中,环氧乙烷的质量均在2~120 μg范围内与其峰面积呈线性关系,检出限(3S/N)均为3 μg·g-1。方法应用于一次性卫生用品的测定,加标回收率在89.5%~105%之间,测定值的相对标准偏差(n=6)在1.3%~2.9%之间。

Gas-solid headspace-GC was applied to the determination of residual amount of epoxyethane in disposable sanitary products including sanitary pad, paper diaper, sanitary towel and so on. After being cut to pieces, the sample was heated to 60 ℃ for 30 mins for equilibrium. Then the headspace gas was extracted and injected into gas chromatograph for analysis by flame ionization detector. The matrix effect was eliminated by matrix-matching calibration. In the matrixes of sanitary pad, paper diaper and sanitary towel, linear relationships between values of peak area and mass of epoxyethane were kept in the same range of 2-120 μg with the same detection limit (3S/N) of 3 μg·g-1. The proposed method was applied to the analysis of samples of disposable sanitary products, giving values of recovery and RSD′s (n=6) in the ranges of 89.5%-105% and 1.3%-2.9% respectively.