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How to convert PPM to percentage

2015-08-09View Original

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When purifying carbon dioxide, the specification sheet states that 3 PPM corresponds to 99.998% – how is this conversion made? What is 0.4PPM as a percentage?
Reply #22015-08-09
10000PPM=1%--------------
Reply #32015-08-09
PPM means one part per million. What medium is 3ppm? Is 99.998% purity a mass or volume percentage?
Reply #42015-08-09
One part in a million, part per million
Reply #52015-08-09
3PPM is a volume ratio! ! ! !
Reply #62015-08-09
3ppm is for oxygen; the percentage refers to mass, right?
Reply #72015-08-09
Isn’t that 3ppm magazine a purity of 99.9997%?
Reply #82015-08-09
There must be other components besides oxygen that are not given much attention and have not been analyzed.

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Translated at 2026-07-21 01:54:29

Original: https://bbs.hcbbs.com/thread-1426861-1-1.html

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