| parts per million |
(ppm) - one ppm is one part in a million parts.
출처: www.ngv.org/ngv/ngvorg01.nsf/bytitle/Glossary.htm
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| parts per million |
a unit that is used to measure the concentration of a substance in a given area. Chemical exposures are usually given as the number of molecules of a chemical within a million molecules of air. One part per million is equal to one drop of water in 18 gallons of water, or one inch in 16 miles.
출처: www.afscme.org/health/safe16.htm
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| parts per million |
Concentration expressed as parts of a dissolved solid (salt, in our case) per million parts of pure water. For example, 1000 ppm of NaCl means 1000 parts NaCl in 1,000,000 parts of pure water. In very dilute aqueous solutions, ppm is approximately equal to 1 mg solute per 1 liter of solution. Abbreviated ppm.
출처: www.myronl.com/main/faqs.htm
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| parts per million |
Typically used in the context of defect Parts Per Million opportunities. Synonymous with DPMO
출처: www.industryforum.co.uk/glossary.htm
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| parts per million |
mg= milligram per liter: Is a unit of measurement of a substance in the water. For example, if you are talking about 8 ppm dissolved oxygen in a lake, that means in one million "drops" or parts of water there are 8 "drops" or parts of oxygen.
출처: www.mlci.org/students/Page.aspx
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