Molarity is the number of moles of solute (substance of interest - pollution, etc.) dissolved in one liter (volume) of the solution. Percent by volume = 100 v c /(v c + v s) (3) Volume percent can be expressed as volume per unit volume: The volume of carbon dioxide in one 1 m 3 of air can be calculated by modifying (1) to The concentration of carbon dioxide in air is aprox. = 8.345 pounds per million gallons of water Example - Volume Concentration of Carbon Dioxide in Air Weight of substance added to one unit volume of water to give one part per million (ppm) The concentration of a component can be measured as mass per unit volume - like mg/liter, mg/cm 3 etc. Weight percent = 100 m c / m s (2) ppm vs. ppq - parts per quadrillion (1 / 1,000,000,000,000,000 or 10 -15)Īn alternatively mass related unit to measure larger concentration levels is weight percent which can be expressed as.percent and mg/L chartĪlternatively - mass related units to measure very small concentration levels: In the metric system ppm for mass can be expressed in terms of milligram versus kg whereĭownload and print ppm vs. S = molar mass, volume or mass of solution (mole, m 3, ft 3, kg, lb m) ppm is defined asĬ = molar mass, volume or mass of component (mole, m 3, ft 3, kg, lb m) Parts per million is the molar mass, volume or mass ratio between the pollutant component and the solution.

= 1.Parts per million - ppm - is commonly used as a dimensionless measure of small levels (concentrations) of pollutants in air, water, body fluids, etc. = 1.0E-6 grams per cubic centimeter (g/cm3) = 0.0001 centigrams per milliliter (cg/mL) = 1.0E-7 centigrams per cubic millimeter (cg/mm3) = 0.0001 centigrams per cubic centimeter (cg/cm3) = 0.001 kilograms per cubic meter (kg/m3)

In relation to the base unit of => (kilograms per cubic meter), 1 Parts Per Million (ppm) is equal to 0.001 kilograms-per-cubic-meter, while 1 Nanograms Per Milliliter (ng/mL) = 1.0E-6 kilograms-per-cubic-meter. How to convert Parts Per Million to Nanograms Per Milliliter (ppm to ng/mL)?ġ x 1000 ng/mL = 1000 Nanograms Per Milliliter.Īlways check the results rounding errors may occur.

The base unit for density is kilograms per cubic meter (Non-SI/Derived Unit) Conversion: Parts Per Million to Nanograms Per Milliliter

How to calculate ppm per ml