| parts per million |
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.
출처: www.ec.gc.ca/water/en/info/gloss/e_gloss.htm
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| parts per million |
number of parts of a chemical found in one million parts of a solid, liquid, or gaseous mixture. Equivalent to milligrams per liter (mg/L).
출처: www.aquatechnologies.com/info_glossary.htm
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| parts per million |
Parts per million may also be expressed as micrograms per gram, milligrams per kilogram or milligrams per liter. A part per million is roughly equivalent to one teaspoon of water in a 21 foot diameter, 4 foot deep swimming pool.
출처: www.egr.msu.edu/tosc/glossary.shtml
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| parts per million |
Specifies the concentration by volume of a substance dispersed in another substance
출처: www.edp-uk.com/glossaries/terms.htm
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| parts per million |
A volume unit of measurement; the number of parts of a substance in a million parts of another substance. For example, 10 ppm nitrate in water means 10 parts of nitrate in a million parts of water.
출처: www.soil.ncsu.edu/publications/BMPs/glossary.html
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