I am looking for a conversion from parts per million to grams per mile. Anyone have the conversion?

Question

Used for emission testing.

If possible just the equation, so that I can input the specific values for the variables

Exhaust emission analyzers read in parts per million (ie. Hydrocarbons, NOx, CO2), EPA guidelines are in indicated in grams per mile. I need to take the analyzers readings and have some comparison to the EPA guidelines.

Answer 1

Um... you're trying to convert unlike quantities. Youneed to ask the emissions people what their conversion is.

Answer 2

We would need to know which two substances are being measured. Parts per million has no dimension. It is a ratio of two quantites. If you provide the substances we can create a dimension. With this it may be possible to convert.

The dimension must be transferrable to grams per mile. Once I see the two substances, I may need more information.
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So you need to know the total volume of emissions per mile at some given speed. Obviously this will change with speed as the engine is tasked differently at different RPM by the Electronic Controls. The ppm ratio would then be multiplied with this figure to give both the dimension (grams/mi) and the value.

Answer 3

Parts per million is strictly a numerical ratio, while grams per mile is a weight/distance ratio. There is no equivalent unless you know (a) how much each "part" weighs and (b) how often each part is used per mile, either by item or weight.

Answer 4

To add to craftman, that conversion is only good for dilute water solutions. If you are really talking miles, there is more data that you need.

Answer 5

in no way related with what you gave.

need specific fuel consumption (mass per time), and speed (miles per time) will give grams per mile

Answer 6

If you are looking for ppm to g/mL (which I think might be the case):

1000 ppmv (ppm by volume) = 1 g/mL

Answer 7

u cannt converse that