1 / 9

Concentrations

Concentrations. Part Per Hundred. Represented by the percent (%) symbol 1 part per 100 parts 1 part in 10 2 A value of 1 × 10 -2 Equivalent to about 15 minutes in one day Prefix: centi Symbol: c. Part Per Thousand. 1 part per thousand should be spelled out in full and not as “ppt”

ernie
Télécharger la présentation

Concentrations

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Concentrations

  2. Part Per Hundred • Represented by the percent (%) symbol • 1 part per 100 parts • 1 part in 102 • A value of 1 × 10-2 • Equivalent to about 15 minutes in one day • Prefix: centi • Symbol: c

  3. Part Per Thousand • 1 part per thousand should be spelled out in full and not as “ppt” • Represented by the permille (‰) symbol. • 1 part per 1,000 parts • 1 part in 103 • A value of 1 × 10-3 • Equivalent to about 1 ½ minutes in a day • Prefix: milli • Symbol: m

  4. Part Per Million • 1 part per million (ppm) • 1 part per 1,000,000 parts • 1 part in 106 • A value of 1 × 10-6 • Equivalent to about 32 seconds out of a year • Prefix: micro • Symbol: 

  5. Part Per Million • A liter of water weighs 1,000 grams, and a milligram is 1/1,000th of a gram • Therefore, a milligram of a substance dissolved in a liter of water represents one millionth (1,000 divided by 1/1,000) of the weight, or one part per million (1 ppm) • One drop of water is 2 ppm of a bathtub full of water

  6. Part Per Billion • 1 part per billion (ppb) • 1 part per 1,000,000,000 parts • 1 part in 109 • A value of 1 × 10-9 • Equivalent to about 3 seconds out of a century • One drop of water is 1 ppb of a swimming pool full of water • Prefix: nano • Symbol: n

  7. Part Per Trillion • 1 part per trillion (ppt) • 1 part per 1,000,000,000,000 parts • 1 part in 1012 • A value of 1 × 10-12 • This is equivalent to about 3 seconds out of every hundred thousand years • Prefix: pico • Symbol: p

  8. Part Per Quadrillion • 1 part per quadrillion (ppq) • 1 part per 1,000,000,000,000,000 parts • 1 part in 1015 • A value of 1 × 10-15 • Equivalent to 2 ½ minutes out of the age of the Earth (4.5 billion years) • Prefix: femto • Symbol: f

  9. Practice Problems • How much is 6 ppm in ppb? • What concentration is 4,000 ppt in ppm? 6 1,000,000 1,000 1,000 6,000 1,000,000,000 x = = 6,000 ppb 4,000 1,000,000,000,000 1,000,000 1,000,000 0.004 1,000,000 ÷ = 0.004 ppm =

More Related