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Encyclopedia :
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PP :
Ppb |
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PpbParts per billion (ppb) is a measure of concentration that is used where low levels of concentration are significant. As the name implies, one ppb is the same as 1/1 000 000 000 or 10-7%. The ppm value is equivalent to the absolute fractional amount multiplied by one billion (109). You can read more about ppm and other similar units under concentration.Similar units:
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