Number of parts of a substance found in one million parts of a particular gas, liquid, or solid.

A unit of concentration, frequently abbreviated to ppm. For solid and liquid concentrations, ppm refers to weight (mass) units. For example: (1) Calcite in a ground barite sample may be 400 ppm. (2) C [..]

A method of stating the performance of a process in terms of actual nonconforming material, which can include rejected, returned or suspect material in the calculation.

Concentration expressed as parts of solute per million parts of solution. Usually refers to parts per million by mass. For example, a 10 ppm NaCl solution can be written as: 10 mg NaCl/kg solution, 10 [..]

The concentration of a substance in air, water or soil. A milligram per kilogram is the same as one part per million. One ppm means that there is one part of a substance for every million parts of sub [..]

A unit of measure of the amount of dissolved solids in a solution in terms of a ratio between the number of parts of solids to a million parts of total volume.

Parts (molecules) of a substance contained in a million parts of another substance (e.g., water).

This is a measure of concentration, i.e., how much solid is dissolved in how much water. Abbr. p.p.m

a ratio figure that represents the amount of one substance that is in one million parts of another substance; commonly used to describe the relative concentrations of nutrient solutions. Passive:

A ratio figure that represents the amount of one substance that is in one million parts of another substance; commonly used to describe the relative concentrations of nutrient solutions. Visit our selection of solution testing equipment.

A unit used to measure contamination concentration (parts of contamination per million parts of water). One part per million is equal to one milligram per liter. (This term is becoming obsolete as instruments measure smaller particles.)

Parts per million is a commonly used unit of concentration for small values. One part per million is one part of solute per one million parts solvent.Also Known As: PPM

the number of "parts" by weight of a substance per million parts of water. This unit is commonly used to represent pollutant concentrations.

Expressed as ppm; a measure of concentration. One ppm is one unit weight of solute per million unit weights of solution. In water analysis the ppm is equivalent to mg/l.

Typically used in the context of defect Parts Per Million opportunities. Synonymous with DPMO

Dimensionless quantity representing 10-6 (1 to 1 million). This proportion can be used for both weight (mass) and volume. For example, 400 ppm (or more precisely, ppmv – parts per million by volume) o [..]

the unit commonly used to represent the degree of pollutant concentration where the concentrations are small. Larger concentrations are given in percentages. 1ppm = 1mg/L. In BOD analysis, the results [..]

A measuring unit for the concentration of one material in another.  When looking at contamination of water and soil, the toxins are often measured in parts per million.  One part per million is equal to one thousandth of a gram of substance in one thousand grams of material. One part per million would be equivalent to one drop of water in twenty ga [..]

Parts per million is a unit of measurement used to state the concentration of specific nutrients, compounds or elements present in small quantities in a feedstuff (e.g., 1 ppm = milligrams per kilogram (mg/kg), 1 pound per million pounds, 1 milligram per liter (mg/L), or 1 microliter per liter (µL/L).  Some more practical equivalents of 1 ppm are: [..]

The number of parts by weight or volume of a constituent in 1,000,000 parts of the final mixture, by weight or volume.

Parts per million parts, a measurement of concentration on a weight or volume basis. This term is equivalent to milligrams per liter (mg/L), which is the preferred term.

Parts per million is a measure of dissolved substances given as the number of parts there are in a million parts of solvent.

The number of "parts" by weight of a substance per million parts of water. This unit is commonly used to represent pollutant concentrations.

A unit of measurement of concentration: a concentration of 1 ppm by volume (also symbolized ppmv) means one unit of volume of one substance (such as a pollutant) in every million (106) of the same uni [..]

A method of expressing low concentrations of impurities in a mixture. The unit can be expressed in moles, volume or weight per million of the same units. Lower concentration may be expressed in parts per billion (ppb) or parts per trillion (ppt).

1ppm is about the same as the contents of a party balloon in the volume of 50 three bedroom houses.

This is a way of expressing very dilute concentrations of substances. Just as per cent means out of a hundred, so parts per million or ppm means out of a million. Usually describes the concentration o [..]

A method of expressing low concentrations of impurities in a mixture. The unit can be expressed in moles, volume or weight per million of the same units. Lower concentration may be expressed in parts per billion (ppb) or parts per trillion (ppt).

A ratio figure that represents the amount of one substance that is in one million parts of another substance; commonly used to describe the relative concentrations of nutrient solutions. Visit our sel [..]

Unit commonly used to express concentrations of contamination and ppm is 1/1,000,000.

the number of parts of a given pollutant in a million parts of air

Units typically used in measuring the number of “parts” by weight of a substance in water; commonly used in representing pollutant concentrations.

A unit of concentration often used when measuring levels of pollutants in air, water, body fluids, etc. One ppm is 1 part in 1,000,000. The common unit mg/liter is equal to ppm. Four drops of ink in a 55-gallon barrel of water would produce an "ink concentration" of 1 ppm.

A measuring unit for the concentration of one material in another. When looking at contamination of water and soil, the toxins are often measured in parts per million. One part per million is equal to [..]