Parts per billion (ppb): Expressed as ppb; a unit of concentration equivalent to the µg/l.
Parts Per Billion (ppb) / Parts Per Million (ppm): Units commonly used to express contamination ratios, as in establishing the maximum permissible amount of a contaminant in water, land, or air.
PARTS PER BILLION: A 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.
Parts per billion (ppb)
A unit of measure used to describe levels or concentrations of contamination. A measure of concentration, equaling 0.0000001 percent.
P parts per billion in volume
Definition (english only)
A way to describe how much of a substance is contained in a sample: parts of analyte per billion parts of sample.
ppb, parts per billion
number of parts of a chemical found in one billion parts of a solid, liquid, or gaseous mixture. Equivalent to micrograms per liter ( m g/L).
ppm, parts per million ...
Parts per billion
The number of parts of a substance per billion parts of another substance into which it is combined. One ppb is comparable to one kernel of corn in a filled, 45-foot silo, 16 feet in diameter.
PB. Parts per billion. Used interchangeably with ug/L (micrograms per liter.)
PPM. Parts per million. Used interchangeably with mg/L (milligrams per liter.)
PPT. Parts per trillion.Used interchangeably with ng/L (nanograms per liter.) ...
ppb Parts per billion. Also µg/L or micrograms per liter.
ppm Parts per million. Also mg/L or milligrams per liter.
ppb
Parts per billion.
ppm
Parts per million.
Prevalence
The number of existing disease cases in a defined population during a specific time period [contrast with incidence].
PPB: Parts per billion.
PPM: Parts per million.
Pressure, Total: In flowing air, the sum of the static pressure and the velocity pressure.
Parts Per Billion (ppb)/Parts Per Million (ppm)
Passive Smoking/Secondhand Smoke
Passive Treatment Walls
Pathogens
Pathway
Pay-As-You-Throw/Unit-Based Pricing
Peak Electricity Demand
Peak Levels
Percent Saturatiuon
Perched Water ...
Parts Per Million (ppm) and Parts Per Billion (ppb) - These terms give scientists a way to describe how much of a substance is contained in a sample: parts of analyte per million parts of sample, for instance.
1 milligram per liter (mg/L) =1 part per million (ppm) =1000 parts per billion (ppb)*
1 microgram per liter (mg/L) =1 nanogram per milliliter (ng/mL) = 1 part per billion (ppb) * ...
Micrograms per liter: Micrograms per liter of water. One thousands micrograms per liter is equivalent to 1 milligram per liter. This measure is equivalent to parts per billion (ppb).
A concentration unit of chemical constituents in solution; the weight of solute per unit volume of solvent, usually water, one thousand micrograms per liter is equivalent to 1 milligram per litre, this measure is equivalent to parts per billion.
However, Philadelphia is the exception. Of the 162 homes tested by the city's Water Department, 15% exceeded the federal guidelines which specify that no more than 10% of the homes should exceed a lead level of 15 parts per billion.
This unit is equal to parts per billion (ppb) since one liter of water is equal in weight to one billion micrograms.
micron (MY-kron). A unit of length. One millionth of a meter or one thousandth of a millimeter. One micron equals 0.
Partition Coefficient: Measure of the sorption phenomenon, whereby a pesticide is divided between the soil and water phase; also referred to as adsorption partition coefficient. Parts Per Billion (ppb)/Parts Per Million (ppm): Units commonly used to ...
of exposure to arsenic include stomach pain, vomiting, diarrhea, partial paralysis, blindness, thickening and discoloration of the skin. The Environmental Protection Agency set a arsenic standard of .010 parts per million (10 parts per billion) for ...
Also called pre-consumer material ppb Parts per billion. ppm Parts per million.
 See also: Air, Water, Ppb, Oxygen, Compounds
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