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- PPB Definition in Chemistry (Parts Per Billion) - ThoughtCoPPB stands for parts per billion. One part per billion is one part of solute per one billion parts solvent. PPB is a commonly used unit of concentration for very small values. The "parts per" notation is not part of the SI system of units. The notation describes dimensionless quantities.
- Parts Per Billion - SafeopediaWhat Does Parts Per Billion Mean? Parts per billion (ppb) is a term that expresses the number of units (parts) of a given substance that exist as a portion of a greater substance comprised of one billion parts. “Parts-per” notations such as ppb are referred to as “volume in volume” measurements.
- 15.03: Solution Concentration - Molality, Mass Percent, ppm ...What is the mass percentage of H 2 O 2 in a solution with 1.67 g of H 2 O 2 in a 55.5 g sample? Related concentration units are parts per thousand (ppth), parts per million (ppm) and parts per billion (ppb). Parts per thousand is defined as follows:
- Parts per Million (ppm) and Parts per Billion (ppb ...Very low solute concentrations are often expressed using appropriately small units such as parts per million (ppm) or parts per billion (ppb). Like percentage (“part per hundred”) units, ppm and ppb may be defined in terms of masses, volumes, or mixed mass-volume units.
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