The maximal frequency variation Δf, divided by the frequency f is equal to the frequency stability The frequency stability of an electronic oscillator component can be measured in ppm. The concentration of carbon dioxide (CO 2) in the atmosphere is about 388ppm. The concentration C in ppm is also equal to the solute mass m solute in milligrams (mg) divided by the water solution volume V solution in liters (l):
When the solution is water, the volume of mass of one kilogram is approximately one liter. The concentration C in ppm is also equal to the solute mass m solute in milligrams (mg) divided by the solution mass m solution in kilograms (kg):Ĭ (ppm) = m solute (mg) / m solution (kg) Then the concentration C in ppm is equal to 1000000 times the solute mass msolute in milligrams (mg) divided by the solution mass msolution in milligrams (mg):Ĭ (ppm) = 1000000 × m solute (mg) / m solution (mg) Usually the solute mass m solute is much smaller than the solution mass m solution. The concentration C in ppm is calculated from the solute mass m solute in milligrams and the solution mass m solution in milligrams.Ĭ (ppm) = 1000000 × m solute / ( m solution + m solute) Solute concentration of 1 ppm is solute concentration of 1/1000000 of the solution. Ppm is used to measure chemical concentration, usually in a solution of water. Ppmv – abbreviation of parts per million volume, a subunit of ppm that is used for part of volumes like milliliters per cubic meter (ml/m3). Ppmw – abbreviation of parts per million weight, a subunit of ppm that is used for part of weights like milligrams per kilogram (mg/kg). One ppm is equal to 1/1000000 of the whole: Ppm is dimensionless quantity, a ratio of 2 quantities of the same unit. ppm is a value that represents the part of a whole number in units of 1/1000000. Ppm is an abbreviation of parts per million.
ppm to ratio, percent, ppb, ppt conversion table.Decimal, percent, permille, ppm, ppb, ppt conversion calculator.