A common basis for reporting the results of water and wastewater analysis, indicating the number of parts by weight of water or other solvent In dilute water solutions, one part per million is practically equal to one milligram per liter, which is the preferred unit 17 l ppm equals one grain per US gallon One ppm equals one pound per million pounds of water
A quality measure of the number of defective items observed or projected out of a population of one million
A unit of concentration For example, air that contains 1 part per million formaldehyde contains 1 2 milligrams formaldehyde in 1 million milliliters air, i e 1000 liters air
unit of measure most often used to describe the amount of a particular gas or compound in the air or wate; it is the proportion of the number of molecules of the gas or compound out of a million (1,000,000,000) molecules of air or water
A measurement of the concentration of a substance in a liquid For example, 3 ppm equals 3 pounds of a substance for a million pounds of a liquid
Unit for measuring concentration of a gas or vapor in air Parts of the gas or vapor in a million parts of air Also used to indicate the concentration of a particular substance in a liquid or solid
Represents the concentration of gases or vapor in air For example, 1 ppm means that 1 unit of the gas is present for every 1 million units of air
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 are expressed in ppm, whereas in the suspended solids test, the values are expressed in percents In air, ppm is usually a volume/volume ratio; in water, ppm represents a weight/volume ratio
the number of "parts" by weight of a substance per million parts of water This unit is commonly used to represent pollutant concentrations
(PPM) - A common basis for reporting the results of water and wastewater analysis, indicating the number of parts by weight of a dissolved or suspended constituent, per million parts by weight of water or other solvent, In dilute water solutions, one part per million is practically equal to one milligram per liter, which is the preferred unit
The number of "parts" by weight of a substance per million parts of water This unit is commonly used to represent pollutant concentrations Large concentrations are expressed in percentages
(PPM) - unit of measurement for concentration of gas or vapor in air - 1 ppm = 0001% In Perspective: 1 inch/16 miles or 1 ounce/31 tons of potato chips
the number of "parts" by weight of a substance per million parts of water This unit is commonly used to represent pollutant concentrations One milligram per liter of water is approximately equal to a ppm
the number of parts of a given substance in a million parts of some other substance (Example: In the ambient air, 1 ppm lead represents one part of lead per 1 million parts of air )
A common basis for reporting the results of water and waste water analyses, indicating the number of parts by weight of a dissolved or suspended constituent, per million parts by weight or water or other solvent In dilute water solutions, one part per million is practically equal to one milligram per liter, which is the preferred unit
A measure of concentration of a dissolved substance Compare milligrams per liter
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 Pasteurisation The elimination of microorganisms by heat applies for a certain period of time Pathogens Disease-producing microorganisms
Number of parts of a substance found in one million parts of a particular gas, liquid, or solid