Parts per million definition

Parts per million means a weight-to-weight ratio; the parts-per-million value multiplied by the factor 8.345 shall be equivalent to pounds per million gallons of water.
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Parts per million or “ppm” means the ratio of the parts of a specified contaminant to a million parts of air by weight (1:10-6), as measured and determined by the methods prescribed for that contaminant.
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Parts per million or “ppm” means parts of a contami- nant per million parts of gas by volume.
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Examples of Parts per million in a sentence

  • Parts per million for one gram of finished extract cannot exceed state standards for any residual solvent or gas when quality assurance tested.

  • Parts per million (ppm) or Milligrams per liter (mg/l) - one part per million corresponds to one minute in two years or a single penny in $10,000.

  • Remark：ppm = Parts per million = mg/kgTested Components：See component list in the last section of this report.

  • Parts per million mass accuracy on an Orbitrap mass spectrometer via lock mass injection into a C-trap.

  • Parts per million on a dry volume basis at fifteen percent oxygen.


More Definitions of Parts per million

Parts per million. (abbreviated as ppm) means one unit per one million units determined by weight unless otherwise noted.
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Parts per million means a weight-to-weight ratio; the parts per million value multiplied by the factor 8.34 are equivalent to pounds per million gallons of water.
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Parts per million means a unit of measurement that is equivalent to 1 milligram per liter (mg/L) whereas the density of the liquid measured is 1.0 grams per cubic centimeter (i.e. the density of water is 1.0).
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Parts per million means parts of a contaminant per million parts of gas by volume.
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Parts per million or "ppm" shall mean a unit of measure of the amount of dissolved solids in a solution in terms of a ratio between the number of parts of solids to a million parts of total volume – ppm.
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Parts per million means the Standard unit for the concentration of a gas constituent relative to one million parts.
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Parts per million means a weight‑to‑weight ratio; the parts per million value multiplied by the factor 8.345 shall be equivalent to pounds per million gallons of water. Parts per million and milligrams per liter (mg/l) shall be synonymous terms.
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