What Is Solute Concentration?

The concentration expressed in parts per million of the mass of the solute in the total solution mass is also called the parts per million concentration.

Solute concentration

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The concentration expressed in parts per million of the mass of the solute in the total solution mass is also called the parts per million concentration.

Chinese name

Solute concentration

Foreign name

The solute concentration

Basic profile and use

The concentration expressed in parts per million of the mass of the solute in the total solution mass is also called the parts per million concentration.

PPM represents the mass of a solute contained in a solution of one million parts per unit mass. A few parts per million is called several PPMs, and PPM = (mass of solute / mass of solution) * 1000000.

In pesticide applications, it is often used to indicate the concentration of the spraying liquid, that is, the number of parts containing one million pesticide active ingredients in the spraying liquid. ppm is the unit of concentration used when diluting a very small amount of pesticides or fertilizers when controlling pests and extra-root fertilizers in agricultural production activities. It is usually called "parts per million ..." For example, 1ppm is one part per million, 150ppm is one hundred and fifty parts per million, and so on. That is to say, when preparing a concentration of 1ppm, 1 gram of pesticide or fertilizer (referring to pure amount) is added to water to make 0.999999 tons (999999 grams). ), And so on. These pesticides or fertilizers are generally only a few percent or dozens of percent pure, and the rest are fillers. Therefore, when formulating the concentration of pesticides or fertilizers, the amount of water added should be determined according to the pure content of the pesticides or fertilizers and the concentration to be diluted (in ppm units). The calculation formula is:

Water content per gram of pesticide or fertilizer = 1000000 × drug (fertilizer) content (%) ÷ concentration (ppm) -1

For example: It is necessary to use 300% of PP333 to make a 300 ppm solution, spray rice seedlings, how many grams of water do you need to add 1 gram of pesticide? It is calculated as follows:

Water volume = 1000000 × 15% ÷ 300-1 = 500-1 (g) = 499g

That is, 1 gram of 15% PP333 plus 499 grams of water can be formulated into a 300 ppm PP333 drug solution.

In most sci-tech journals, ppm has been discontinued and "" has been used instead. The ppm converted into is: 1ppm = 0.001 .

ppm is the abbreviation of parts per million in English, which means a part of every million points, which means parts per million (several), or parts per million. One million kilograms of a solution, such as 1 ppm, contains 1 kilogram of solute. ppm is the same as the percentage (%), except that its percentage is greater than the percentage.

In flower production and cultivation, "micro-fertilizer" and "phytohormones" are often applied. When these agents are applied, their dosage is very small, and the capacity per kiloliter contains only a few milligrams or less, so it is expressed by "ppm" .

It is often used to indicate the concentration of a gas, or the concentration of a solution.