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Topic: How do you convert Vapor pressure to ppm?  (Read 15307 times)

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Offline beeman1

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How do you convert Vapor pressure to ppm?
« on: April 02, 2008, 09:07:03 AM »
i have calculated the vapour pressure of some common odours diluted in mineal oil.  would now like t know how to calculate the ppm of the vapour that is being produced. Can i do this calculation without experimentation?

Amir
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Offline Valdorod

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Re: How do you convert Vapor pressure to ppm?
« Reply #1 on: April 02, 2008, 01:23:56 PM »
Amir:

concentration and pressure are related by the ideal gas equation:

P=(n/V)*RT

where (n/v) is the concentration in moles per liter.

or you can look at it in this form

P=MRT, where M is the molarity

If you know the density of your solutions then you can convert concentration into ppm.

Valdo
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Offline Borek

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Re: How do you convert Vapor pressure to ppm?
« Reply #2 on: April 02, 2008, 01:28:49 PM »
Which ppm? v/v? w/w?
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