I was doing some exercises, i have a question here.
If the answer for a certain ppm question is, say, 3000. But if i were to write if at 0.003 ppm, is it acceptable?
Does the term ppm indicates 10^6 or it's only a unit?
I'm confused now Because some practices that i did, when the answer is 2.16 X 10^6, they just write it as 2.16 ppm.
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- Thread Starter
- 21-05-2010 14:18
- 21-05-2010 16:20
ppm means parts per million. 2 ppm means '2 particles in every million'.
If you get an answer of 10^6 you can write it using SI prefixes- 10^6 is mega or M. So 2x10^6g is 2Mg. http://en.wikipedia.org/wiki/SI_prefix