主题:气溶胶的MMD

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guiliangc
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气溶胶的MMD是如何测定和表示的?
推荐答案:yxybgp回复于2006/11/28
MMD是指质量(或体积)中位径,与CMD,SMD的换算关系如下:
For a log-normal distribution, there are closed-form relationships between
median diameters of different weightings. The count median diameter (CMD)
is related to the surface median diameter (SMD) by
( ) g
SMD = CMD∗ exp 2ln2 σ (7.26)
The CMD is related to the mass (or volume) median diameter (MMD) by
( ) g
MMD = CMD∗ exp 3ln2 σ (7.27)
The relationship between MMD and SMD is
( ) g
MMD = SMD∗ exp ln2 σ

邮件探头:susie@anpico.com
补充答案:

sosolee回复于2005/05/17

是不是,气溶胶粒子质量中值直径(MMD)
全称:mass median diameter of aerosol particle

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sosolee
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是不是用微粒检测仪测定测定的那种 (例如:Malvern2600微粒检测仪)?.....
sosolee
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哦...
我还是觉得你的帖子发在环境监测中的气体监测中好一些,这样看到的相关人员能多一些,你觉得呢?
guiliangc
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guiliangc
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sosolee
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是不是,气溶胶粒子质量中值直径(MMD)
全称:mass median diameter of aerosol particle
yxybgp
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MMD是指质量(或体积)中位径,与CMD,SMD的换算关系如下:
For a log-normal distribution, there are closed-form relationships between
median diameters of different weightings. The count median diameter (CMD)
is related to the surface median diameter (SMD) by
( ) g
SMD = CMD∗ exp 2ln2 σ (7.26)
The CMD is related to the mass (or volume) median diameter (MMD) by
( ) g
MMD = CMD∗ exp 3ln2 σ (7.27)
The relationship between MMD and SMD is
( ) g
MMD = SMD∗ exp ln2 σ

邮件探头:susie@anpico.com
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