Parts per Million (PPM)

Definition

PPM is a unit of measurement used to express the concentration of one substance in a solution or mixture. It represents the number of parts of a particular substance per million parts of the whole.

Related terms

Parts per Billion (PPB): Similar to PPM, PPB is another unit of measurement used for even smaller concentrations. It represents the number of parts of a substance per billion parts.

Concentration: Concentration refers to the amount or proportion of a substance present in a given volume or space.

Dilution: Dilution is the process of reducing the concentration of a solute in a solution by adding more solvent.