顶空气相色谱法测定固定污染源废气中四氢呋喃

Determination of the tetrahydrofuran in the fixed source of exhaust gas by headspace gas chromatography

采用气相色谱静态顶空建立了一套操作简便、高效、快速测定固定污染源废气中四氢呋喃的方法。并研究了检测的灵敏度,及静态顶空自动进样器的解吸效率。线性范围为0.00~161.3 mg/L,线性方程为y=735.614x-442.012,r=0.9990,检出限为0.86 mg/L,当采样体积为20 L,四氢呋喃的最低检出质量浓度为0.086 mg/m,精密度试验相对标准偏差为3.8%~4.9%,方法解吸效率为90.8%~98.6%。

Headspace was used for measurement of the tetrahydrofuran in the fixed source of exhaust gas.The method of measuring was established.The sensitivity of detection and the desorption efficiency was explored.The linear range of the method was 0.00~161.3 mg/L,the linear equation was y=735.614 x-442.012(r=0.9997),MDL was 0.86 mg/L,When the sampling volume is 20L,the minimum detected mass concentration of tetrahydrofuran is 0.086 mg/m,RSD was 3.8%~4.9%and the desorption coefficien was 90.8%~98.6%.