不同溶剂对活性炭采集氯苯类化合物解吸效能研究

通过在活性炭吸附采样管中定量加入氯苯类化合物标准样品,于大气采样器上模拟采样后测定各组分回收率的方法,研究了实验室常用有机试剂二硫化碳、甲醇、正己烷、苯、乙腈、丙酮等,对活性炭采集大气中氯苯类化合物的解吸性能.实验结果表明,二硫化碳溶剂对氯苯类化合物各组分具有较为高效、稳定的解吸效能,是日常环境监测实践中使用活性炭吸附-气相色谱法测定环境空气和污染源有组织排放废气中氯苯类化合物的较为理想解吸溶剂.

Study on Desorption Capability of Different Organic Reagents toChlorobenzene Compounds in Activated Carbon

The desorption capability of chlorobenzene compounds in activated carbon to different organic reagents, such as carbon disulphide, methanol, n-hexane, benzene, acetonitrile and acetone, were evaluated by observing the recovery ratios to each compound in activated carbon after simulating sampling with atmospheric sampler and gas chromatopraphy.Results show that carbon disulphide had a relatively high and stable desorption performance, which was suitable for the desorption of chlorobenzene compounds in activated carbon by gas chromatography in ambient air and emissions.