Understanding PPM

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Can anyone explain if you have 500 ppm of moisture in oil analysis sample of 100 ml, does it mean that it is also the same 500 ppm in a let's say 1000 liter of oil in the reservoir?

thanks,

rolaa12
 
The phrase "it is also the same 500 PPM" shows confusion, and concerns me a bit.

Know that there will be a 10K increase in the actual volume of HOH in the 1000L sample

but the ratio of constituents will be equal. as .0005
 
Originally Posted by rolaa12
Can anyone explain if you have 500 ppm of moisture in oil analysis sample of 100 ml, does it mean that it is also the same 500 ppm in a let's say 1000 liter of oil in the reservoir?

thanks,

rolaa12

Think of ppm as percentage. 500 ppm is the same as 0.05%.
 
From my old boiler chemistry analysis days (iirc) there are about 20 drops of water in a ml. So your 500 ppm of water is approx equivalent to 3 drops of water in a 10 ounce glass of your favorite beverage
 
As long as the samples are representative the numbers will be consistent. Quattro Pete's suggestion of thinking of it as a percentage is spot on.
 
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