Welcome to OnlineConversion.com Forums 

Convert and Calculate Post any conversion related questions and discussions here. If you're having trouble converting something, this is where you should post. * Guest Posting is allowed. 

Thread Tools  Display Modes 
#1




Convert ppm to micrograms per cubic metre
I need a conversion of 330 ppm of NO2 to micrograms per cubic metre.
Thanks, John 
#2




Re: Convert ppm to micrograms per cubic metre
ppm is equivalent to mg/kg
So you just need to find out the density of the solution. Multiply the density in kg/m³ by mg/kg and you get mg/m³. From there its not difficult to convert mg/m³ to µg/m³ Not exactly sure of your situation, is it parts NO2 per million parts solution? Then its the solution you need the density of. 
#3




Re: Convert ppm to micrograms per cubic metre
Thanks Robert.
My situation is that we have taken an emissions test. The air sample contained 330 ppm of NO2. Does this information help. John 
#4




Re: Convert ppm to micrograms per cubic metre
Hi,
for gas systems, 330ppm is 330uL/L, or 0.33L/cubic meter I'm off work at the moment for school holidays, and my SI Chemical data book is at work. However from memory, one mole of gas occupys 22.4L at stp (0°C, 1atm). The molar mass of NO2 is 46g/mol, so 0.33/22.4 x 46 = 0.6776g. This is 677.6mg per cubic meter. You will need to correct this for the actual amount that one mole of gas occupies at whatever temperature your sample was measured at. Sorry about the lack of concrete help. 
#5




Re: Convert ppm to micrograms per cubic metre
Oh dear... for ug, 677,600 or thereabouts.

#6




Re: Convert ppm to micrograms per cubic metre
Thanks.
The temperature of the gas was 943° F The temperature of the air was 48° F I hope this is enough information to get the conversion. John 
#7




Re: Convert moles to micro grams
i just want to know how to convert moles to micro grams

#8




Re: Convert moles to micro grams
Quote:

#9




Re: Convert ppm to micrograms per cubic metre
Caline 4 indicates results give CO prediction at 14ppm . how do I convert it to micrograms per cubic metre?

#10




Re: Convert ppm to micrograms per cubic metre
Dear John,
Mrs X has basically told you what to do but you also need to ensure that you correct for temperature ppm(stp) = ppm(@ Tm) x Tstp / Tm where Tm is the temperature measured and T stp is the standard temp & pressure so convert Temp in F to K (Check this, formula I'm not US and who else in the world still uses F, miles etc But I digress.... Kelvin = 273 + 32 + 1.8F) Follow Mrs X's instructions ug/m3 = 273/(305 + 1.8F) * ppm (@tm) * M (eg SO2 = 64) / 22.4 
Thread Tools  
Display Modes  

