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WordNet-Online
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Definitions from the WebPPB:Definition:PPB stands for "parts per billion." It is a unit of measurement used to indicate the proportion of one substance in a billion parts of another substance. It is commonly used in scientific and environmental contexts to express extremely small concentrations or dilutions. Examples:Noun: In the field of chemistry, a concentration of 10 ppb of a particular compound in a liquid solution denotes that there are 10 parts of the compound per billion parts of the solution. Example sentence: The water sample contained a ppb level of mercury, which exceeded the safe limit for human consumption. Adjective: The local authorities reported air pollution levels above 100 ppb of ozone, indicating poor air quality in the region. Example sentence: Due to higher traffic and industrial emissions, the city often experiences high ppb measurements of various pollutants. Related Products: | ||||
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