how to convert 1ppm to microgram/metercube?

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how to convert 1ppm to microgram/metercube?

Postby shaz » Tue Jan 01, 2008 2:31 pm

:?:
shaz
 

Re: how to convert 1ppm to microgram/metercube?

Postby Guest » Tue Jan 01, 2008 8:51 pm

What kind of ppm? Ppm is meaningless unless you specify whether it is a ratio by weight, volume, or mole fraction. It is better to state it explicitly as a ratio with units 10^6 apart such as mg/kg, mL/kL, µmol/mol

If it is not by weight, what is the "pollutant"? It's density or molecular weight will be needed to convert it to micrograms.

What is the main part, the "million parts." Depending on its initial units, it may need to be converted to volume.
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