Why use ppm

Thus, PPM refers to one item in a million of anything of the same size. PPM is commonly used in measuring air, water and body fluids pollution. PPM is the mass ratio between a component and a solution. Mathematically, 1 PPM can be expressed as following:.

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Meet the Author with Robert J. De Boer. Safety Talks 18 - Heat Stress Preparedness. The Dangers of Gas in a Confined Space. Contact Dealer Locator. What does PPM mean? Go back to main blog. Volver al blog. Parts per million? A million of what? Parts of what? PPM is the US standard unit of measurement in water chemistry.

It tells us the density of a given substance dissolved in water. Examples include free chlorine, calcium hardness, and total alkalinity. It seems like a tiny amount—and it is—but water does not always need a lot of a given chemical.

For example, j ust 1. It may not be enough to keep the pool algae-free, but that's another topic for another article. Where did the million come from? To find out, we did some research which led us to the metric system. One milligram is one-millionth of a liter. The rest of the world already knows this because the metric system is standard and based on multiples of For us Americans, we need to take the time to convert. Then we transition from liquids into solids, because most chemicals are dissolved into water, not liquids themselves.

So one milligram mg is one-millionth of one liter L. Any standard unit of measurement is important to understand. It tells us the amount—expressed as concentration or density in the water—of a given substance. Or, in the case of Total Alkalinity TA , the sum of several substances. Traditional water chemistry ranges use PPM for almost everything except pH , which has its own logarithmic scale:.

You may be thinking, "Wait, Orenda sometimes recommends chemistry outside of those ranges. So, r ather than focusing on ideal chemistry ranges, focus on the LSI. Just remember to prioritize LSI first and range chemistry second.