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parts per billionNumber of parts of a substance found in one billion parts of a particular gas, liquid, or solid.
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parts per billionA unit of concentration.
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parts per billionA way of expressing the concentration of a substance in air, water, soil or food. A microgram per kilogram is the same as one part per billion. One ppb means that there is one part of a substance for [..]
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parts per billionNumber of parts of a chemical found in one billion parts of a particular gas, liquid, or solid mixture. See concentration.
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parts per billionA unit frequently used to measure contamination concentration (parts of contamination per billion parts of water). One thousand parts per billion is equal to one part per million.
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parts per billionParts per billion is a commonly used unit of concentration for very small values. One part per billion is one part of solute per one billion parts solvent.
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parts per billionNumber of parts of a chemical found in one billion parts of a particular gas, liquid, or solid mixture. parts per million (ppm)
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parts per billionthe number of "parts" by weight of a substance per billion parts of water. Used to measure extremely small concentrations.
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parts per billionExpressed as ppb; a unit of concentration equivalent to the µg/l.
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parts per billionA unit of measure used to describe levels or concentrations of contamination. A measure of concentration, equaling 0.0000001 percent. For example, One part per billion is the equivalent of one drop of impurity in 500 barrels of water. Most drinking water standards are ppb concentrations.
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parts per billionA unit of measure used for very small quantities, it is equal to the ratio of the weight or volume of one component of a mixture to a billion weights or volumes of the mixture. When based on weight (p [..]
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parts per billionµg/l, a measurement of concentration on a weight or volume basis. This term is equivalent to micrograms per liter. Parts Per Million (PPM)
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parts per billionThe number of "parts" by weight of a substance per billion parts of water. Used to measure extremely small concentrations.
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parts per billionA unit of measurement of concentration: a concentration of 1 ppb by volume (also symbolized ppbv) means one unit of volume of one substance (such as a pollutant) in every billion (109) of the same uni [..]
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parts per billionRepresents the concentration of something in water or soil. One ppb represents one microgram of something per liter of water (ug/l), or one microgram of something per kilogram of soil (ug/kg).
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parts per billionUnit commonly used to express concentrations of contamination and ppb is 1/1,000,000,000. An example is 0.005 ppm equals 5 ppb.
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parts per billionA unit of measure used to describe levels or concentrations of contamination. A measure of concentration, equaling 0.0000001 percent. For example, One part per billion is the equivalent of one drop of [..]
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