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How does ppm compare to ppb?
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How does ppm compare to ppb?

User Archana Roy
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Another way to say it is a liter of water weighs 1,000 grams or 1 million mil- ligrams. Therefore, 1 mg in 1 liter is l mg in 1 million mil- ligrams or 1 part per million. An even smaller concentra- tion measurement is parts per billion (ppb).
User MKroeders
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