Significats de part per billion en anglès

Able to smell explosive traces as fine as one part per billion.

The state's limit is one part per billion, below the federal government's limit of five parts per billion.

Prof Wall said there was a time when science could detect chemicals and taint in milk at one part per billion.

There is methane on Mars too, but the measly amount, just one part per billion, may come from reactions in rocks.

On Mars, the amount of methane floating around is measly: about one part per billion, with bursts reaching 10 times that amount.

Conclusions: MAP has an analytical selectivity of one part per billion for detection of MIDIs and an analytical sensitivity of one molecule.

Chlorofluorocarbons are also not very abundant-theyconstitute only about one part per billion of the atmosphere as a whole-butthey are extravagantly destructive.

Scripps A plane with a hyperspectral sensor will measure the ocean's color, detecting dye down to just half a part per billion, says Feddersen.

They show that the gas is present at about 1 part per billion in the Martian atmosphere, or 4,000 times less than in Earth's air.

The EPA says a concentration of five parts per billion is acceptable.

Note that micrograms per liter is the same thing as parts per billion.

My tap water sample was very close to five parts per billion TCE.

The spectrometers typically detect chemicals in the "low parts per billion" range.

The highest test results were at 11 parts per billion (ppb).

The European Union limits are 60 parts per billion.

Its mass is uncertain to 20 parts per billion.