【摘要】 对我国开展大气VOCs监测的必要性、监测现状以及主要使用的监测方法进行了分析。目前,我国已初步建立了大气VOCs手工与自动监测网络,主要采用预浓缩-热脱附-气相色谱-质谱/氢火焰离子化检测器法进行PAMS组分和TO-15组分分析,利用高效液相色谱法进行13种醛、酮类组分分析。目前大气VOCs监测还存在数据质量、灵敏度有待提高,不同设备或方法监测结果一致性较差等问题。为此在VOCs监测过程中应进一步加强质量保证与质量控制,并尝试通过提高预浓缩装置除水和干扰物效率、提升进样量等多种手段提高监测灵敏度。更多还原

【Abstract】 The necessity,current situation and main monitoring methods of ambient VOCs monitoring in China were analyzed. Currently,a monitoring network of ambient VOCs was preliminarily established,in which both manual and automatic monitoring methods were applied.PAMS and TO-15 components were mainly monitored by gas chromatography-mass spectrometry/hydrogen flame ionization detector coupled with a cryo-focusing and thermal desorption unit,while 13 aldehyde and ketone compounds were mainly analyzed by high performance liquid chromatography. However,the improvement of data quality and monitoring sensitivity remained challenges,and the monitoring data among different equipments or methods showed poor consistency. Strict quality assurance and quality control measures should be performed during VOCs monitoring. Besides,monitoring sensitivity should be improved by different methods,such as improving removal efficiency of water and interfering substance of cryo-focusing unit,and using large volume injections.更多还原