[Effect of particles size calibration on air microbe sampling].
The airborne bacterial particles number sampled with 6 grades Andersen sampler at Xidan in Beijing from 1987 to 1988 was calibrated by the alive bioparticles calibration formula. The results showed that the average number of airborne bacterial particles sampled in 3 minutes and in 84.9 L air was 257, but it is 315 when calibrated. The later was higher than the former (t = 2.012, P < 0.05). The average number sampled with the 1st grade sampler (> 8.2 microns) was 98, but it is 136 when calibrated, and the difference was obviously (t = 2.409, P < 0.05). There was no obvious difference between the number sampled with the rest grades sampler (2nd-6th) and when calibrated (t = 1.701-0.026, P > 0.05). The effects of calibration on the particles size distribution and its concentration day's change were not obviously.
Hu
Q
Q
Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, China.
D000391:Air Microbiology; D002681:China; D010316:Particle Size; D012494:Sampling Studies