| parts per million |
one part in a million. Abbreviated ppm and commonly used to express defect levels or concentrations. Passivation - a final layer or layers put on semiconductors to protect them against contaminants and mechanical damage.
출처: www.icknowledge.com/glossary/p.html
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| parts per million |
A quality measure of the number of defective items observed or projected out of a population of one million.
출처: www.bridgefieldgroup.com/glos7.htm
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| parts per million |
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. Therefore 500,000 ppm is the same as 50 per cent, because 500,000 is half of a million. The concentration of oxygen in unpolluted fresh water is about 8 ppm ?only 8 parts of oxygen for every 1 million parts of other substances.
출처: www.science.org.au/nova/034/034glo.htm
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| parts per million |
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.
출처: www.1st-water-filters.com/water-filtration-glossar...
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| parts per million |
One part of a substance in one million parts of another substance, by weight; for example, approximately 2.72 lbs of active ingredient applied to one acre-foot of water will give 1 ppmw.
출처: edis.ifas.ufl.edu/BODY_AG007.html
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