Ppm calculation formula pdf

Going through a basic PPM calculation by volume or by mass will help to cement the concepts you need to understand. For mass, imagine you have 0.98 liters of water with 0.2 g of salt dissolved in it, noting that 1 L of water = 1 kg of mass, so the total mass in the example is 1 kg.

After converting both to the same mass unit, the proportion of salt in the water is given by:

\(\begin{aligned}\)
\(\frac{\text{mass of solute}}{\text{mass of whole solution}} &= \frac{0.2 \text{ g}}{1000 \text{ g}}\)
\(&= 0.0002\)
\(\end{aligned}\)

So this is basically "parts per part," meaning that for one part solution you have 0.0002 parts salt.

But of course, having this many decimal points isn't exactly convenient, so to convert to PPM you multiply by 1,000,000 = 10⁶, giving: 0.0002 × 10⁶ = 220 PPM.

The general approach works for volume calculations, too.

Imagine you have a sample of 1 m³ of air, with 0.0004 m³ of carbon dioxide in the mixture: What is the PPM concentration of carbon dioxide? Starting with the "parts per part" or "parts per 1" calcul

how to get concentration in ppm

how to determine concentration in ppm