Parts-per Trillion to Parts-per Quadrillion conversion

What is parts per trillion?

The parts-per is a prefix combined with trillion describes a quantity of some thing present relative to another. This unit is not part of SI unit system and it is commonly denoted as ppb or $ppb$ which is 1 quantity of something present in 10^12 of others.

Wikipedia page for explanation on Parts-per notation

What is parts-per quadrillion?

A very small number!

Parts per quadrillion (ppq) is a unit of measurement that represents one part in 1,000 trillion or 10^15.

To put it into perspective:

• 1 ppq = 1/1,000,000,000,000,000
• That's equivalent to 0.000000001%

In scientific and engineering applications, parts per quadrillion is used to express extremely small concentrations of a substance in a given volume or mass. For example, it might be used to report the concentration of a contaminant in water, air, or other substances.

To give you an idea of just how tiny 1 ppq is, consider this:

• A typical drop of blood contains around 5-6 parts per million (ppm) of hemoglobin.
• 1 ppq is equivalent to about 0.00005% of the concentration found in that same drop of blood.

Now, you might be wondering when or why someone would use a unit as small as ppq. In reality, it's mostly used in specialized scientific fields like environmental monitoring, materials science, and nanotechnology, where tiny concentrations can have significant effects on measurement results or material properties.