Parts per trillion (PPT) is a unit of measurement used to describe the concentration of one substance in a larger mixture. It is commonly used in environmental science, chemistry, and biology to measure extremely low concentrations of pollutants, contaminants, or other substances. One part per trillion means that there is one part of the substance for every trillion parts of the total mixture. This unit is useful for detecting and quantifying trace amounts of substances that can have significant effects even at very low concentrations.
The formula to calculate parts per trillion is:
\[ \text{PPT} = \left(\frac{A}{T}\right) \times 10^{12} \]
Where:
Let's assume the following values:
Using the formula:
\[ \text{PPT} = \left(\frac{0.0001}{1000}\right) \times 10^{12} = 100 \text{ PPT} \]
The PPT is 100 parts per trillion.
