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目前,对于大气或环境气体中有机组分的测定很多采用气体色谱法。对ppm级的有机组分,只要找到合适的分离条件,多数可用氢焰离子化检测器,用直接进样法来完成任务。至于低于这个水平的有机组分则必须进行浓缩预处理(或采用高灵敏的选择性检测器)。为了要提高浓缩效率,可选择适当的吸附剂。这种吸附剂的选择要满足下列条件:①大气或环境气体中的水蒸汽应排除在外;②有足够的吸附量和快速脱附效率;③与样品组分不起化学作用。有机高分子多孔小球是一种优良的反相吸附剂,它对非极性的有机物质有较高的吸
Currently, gas chromatography is often used for the determination of organic components in atmospheric or ambient gases. For ppm-level organic components, as long as the appropriate separation conditions to find the majority available hydrogen flame ionization detector, using direct injection method to complete the task. As for organic components below this level, concentration preconditioning (or the use of highly sensitive selective detectors) must be performed. In order to improve the concentration efficiency, you can choose the appropriate adsorbent. The choice of this adsorbent to meet the following conditions: ① atmospheric or atmospheric water vapor should be excluded; ② sufficient adsorption capacity and rapid desorption efficiency; ③ and the sample components can not afford chemical effects. Organic polymer porous beads is an excellent reverse-phase adsorbent, it has a high non-polar organic substances absorption