小中大一台仪器测PM10,PM2.5,PM1,怎么实现?
RT
看到有篇文献中下到一台仪器测PM10,PM2.5,PM1,通过不定时开关三种大小选择性进样口来实现。
根据国标中的定义。
PM10
悬浮在空气中,空气动力学直径≤10μm的颗粒物。
PM2.5
悬浮在空气中,空气动力学直径≤2.5μm的颗粒物。
测得的PM10,肯定要比PM2.5 大了,是吧?
原文如下:
Selectivity is obtained, as PM10, PM2.5 or PM1, via a
separate size-selective inlet having the desired particle
size discrimination properties.Therefore, a single
TEOM with three separate size-selective inlets should
be capable of yielding data on each of PM10, PM2.5 and
PM1 if switched periodically between separate PM10,
PM2.5 and PM1 inlet systems.