CUSTOMER PROBLEM：Many possible terrorist threats have been identified by the Department of Homeland Security, among which is the use of Toxic Industrial Chemicals (TICs) to either harm building occupants or cause business disruptions. In order to maintain a level of security for populated buildings, a continuous air monitoring system should be employed in the building air handling systems or at entrances, mail rooms, and shipping docks. Initial systems deployed for TIC detection used monitoring technologies which have been found to lack the sensitivity or selectivity to make them useful against multiple chemical threat sources in the presence of interferents such as common solvents and cleaners. These interferents have often resulted in a large number of false alarms which are costly and reduce the overall customer satisfaction with the monitoring system. An analyzer that can detect multiple agents very quickly with no, or extremely infrequent, false alarms will enhance the utility and security protection offered by these ambient air monitors for homeland security applications.

美国环境保护委员会（EPA）制定的新环保法规要求极其严格的限制从水泥生产厂和发电厂（EGU）等行业排放的含有HCL的酸性气体。新的排放标准要求HCL的排放最高极限值在7％无水O2条件下，硅酸盐水泥制造废气排放为3 ppmv，而发电厂的废气排放是1ppmv。新排放法规要求装备更高感光度并能监测HCl酸性气体的连续排放监测系统（CEMS），同时适应含有腐蚀性气体，并且颗粒含量高的气流...