To calculate PPM from MCG:
\[ \text{PPM} = \frac{\text{MCG}}{\text{V}} / 1000 \]
Where:
MCG, short for microgram, is a unit of measure that is equal to 1/1000th of a gram. To convert this value into PPM, you must know the volume the mass occupies.
Let's assume the following values:
Using the formula:
\[ \text{PPM} = \frac{5000}{2} / 1000 = 2.5 \]
The Parts Per Million is 2.5 ppm.