Conversion

[Tagbede]

I like to convert from microgram/m3 to parts per million(ppm). How do I go about it?

[Knight]

I like to convert from microgram/m3 to parts per million(ppm). How do I go about it?

The conversion factors are based on the molecular weights of the different contaminants and are different for each chemical.

For example, benzene's conversion factor for changing micrograms per cubic meter (µg/m³) to parts per million (ppm) is 0.00325.

Dividing the value of micrograms per cubic meter (µg/ m³) by 0.00325 will change the value to parts per million (ppm).

So, 10 µg/ m³ of benzene divided by 0.00325 is 3,076.9 ppm by volume in air.

[tvanellen]

I'm afraid there's an error here. 1 ppm benzene = 3.2 mg/m3 or 3200 microgram/m3. This means that 10 microgram/m3 benzene equals 1/320 or about 0.0031 ppm.

[nurul hidayat]

What is the general equation for this conversion?

[Eucharia Nwaichi]

,Dividing the value of micrograms per cubic meter (µg/ m³) by 0.00325 will change the value to parts per million (ppm)' is wrong. Rather multiply the value of micrograms per cubic meter (µg/ m³) by 0.00325 will change the value to parts per million (ppm).