What does PPT stand for?

Parts Per Trillion

This definition appears very rarely and is found in the following Acronym Finder categories:

Science, medicine, engineering, etc.

Other Resources:

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Political Psychology (course) Pacific Play Tent Pacific Prevailing Time Package Peak Temperature Paid Part-Timer Papeete, French Polynesia - International Tahiti-Faaa (Airport Code) Paper and Pencil Test (various organizations) Partial Prothrombine Time Partners for Public Transportation Parts Per Thousand		Pass Prediction Table Patria Para Todos (Homeland for All, political party) Pay-Per-Transaction Peak Power Tracker People's Party of Timor (East Timor) Percentage Points (financial reports) Performance Price Tradeoff (government contracts) Permeability Plugging Tester (drilling industry) Personal Productivity Tool (usually meaning a personal computer) Personal Property Tax

Samples in periodicals archive:

The team predicted that asteroid bombardment would leave iridium levels of 18,000 and 10,000 parts per trillion in rocks on the Earth and moon respectively, while the same figures for comet bombardment would be about 130 and 10.

Comets, not asteroids, scarred Moon's face about 4 billion years ago

That s reassuring, since PCB levels in Stillwater s wells which are adjacent to the Hudson reached 160 parts per trillion last month.

United States: Editorial EPA water filter plan OK for Stillwater

Sixteen samples at eight locations at the Terminal 117 Site in South Park were contaminated with dioxin, with an average of 63 parts per trillion found.

Pacific Northwest

Newly developed technology can measure substances in such tiny amounts as parts per trillion.

EDITORIAL IMPURITIES IN WATER CAUSE FOR CONCERN, NOT PANIC

But traces found in water supplies are measured in parts per billion or even parts per trillion.

No reason to panic over pharmacological cocktail

Most become aware of TCA in quantities as small as 5 parts per trillion.

Cork Verses Screw Cap Debate

Amounts range from a few parts per trillion (ppt) to hundreds of parts per million (ppm).

Knife & Fork : Food toxins

Both occurred at a few parts per trillion (ppt), the group reported in an April supplement to Environmental Health Perspectives.

Something's fishy about these hormones