3、talmeasurementofthedetectionlimitandresponsetimeforabio-aerosoldetectioninstrumentYAN Xue-kun, HAN Jun, LIU Ming-jian, LI Yang, ZHANG Yan, LUO Ming(No. 92609 Unit of the PLA, Beijing 100077, China)Abstract:Detection limit and alarm response time of bio-aerosol particles are two impo
4、rtant indicators for bio-aerosolreal-time detection instrument based on intrinsic fluorescence measurement. A method for detecting the concentration of bio-aerosols in the atmosphere is presented. Firstly, pure synthetic air was used to dilute the simulated bio-aerosol particles, an
5、dthen, the diluted simulated bio-aerosol particles were discharged by two pipelines, one was inhaled into the optical particlesizer spectrometer (model TSI-3330) for standard count of bio-aerosol particles, and the other was inhaled into the bio-aero-sol real-time detection instrume
6、nt for testing its indicators. Testing results show that our bio-aerosol real-time detection in-strument is sensitive to the bio-aerosol particles, at 1 000/L level, both in pure synthetic air and in the real atmosphere. In par-ticular, its alarm response time is less than one minut
7、e. This is valid for the calibration of bio-aerosol real-time detection in-strument, and may also be adopted for counting measurement of bio-aerosol or other particles.Keywords: bio-aerosol detection;intrinsic fluorescence;concentration measurement;detection limit;responsetime;dynam