工作场所中苯系物的热解吸气相色谱法测定

Determination of Benzene Series in the Workplace by Thermal Desorption Gas Chromatographic Method

目的：对色谱峰分离条件进行优化，建立工作场所中苯系物的分离检测方法；方法：用活性炭管采集工作场所空气，热解吸法自动进样，GsBp-5毛细管色谱柱，柱温为65~80℃（各保留1min），5℃／min程序升温，进样口温度150℃，检测器温度250℃，氨火焰离子化检测器分析检测。结果：在本方法条件下，苯及苯系物各组份分离效果较好，线性良好．准确度高。结论：该方法对苯系物分离操作简便，准确度高，适合于工作场所空气中苯及苯系物分离检测。

Objective： to optimize the gas chromatographic separation conditions and to establish the separation and detection methods of benzene in the workplace. Methods： using activated carbon tube workplace air was collected and thermal desorption method of automatic sampling, GsBp-5 capillary chromatographic column, the column temperature is 65-80 ℃ （the hold time of lmin）, 5 ℃/min temperature programmed, the inlet temperature of 150 ℃, detector temperature of 250℃, hydrogen flame ionization detector analysis. Results： in this method, the separation effect of benzene series is better, the linearity is well, and the accuracy is high. Conclusion： the method is simple and accurate, and is fit for the separation and detection of benzene series in the air of workplace.