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Topic: Part per million


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In the News (Sat 20 Apr 19)

  
  EXTOXNET TIBs - HOW MUCH IS A PART PER MILLION?
One part per billion is the equivalent of one drop of impurity in 500 barrels of water.
A milligram is one part per million of a kilogram thus, one part per million (ppm) is the same as one milligram per kilogram.
Similarly, a part per billion of a solid in a liquid is equal to a ug/l.
extoxnet.orst.edu /tibs/partperm.htm   (1346 words)

  
 Parts Per Million: Part 1
Parts per million (abbreviated ppm) is one part in a million parts.
One pound of sugar in 120,000 gallons of water is one part per million, or one ten thousandth of a percent.
Parts per million is an easier, better term to visualize than percentages for concentrations in water.
water.me.vccs.edu /math/ppm1b.htm   (704 words)

  
 FDA > CDRH > CFR Title 21 Database Search
A tolerance of 0.02 parts per million (ppm) is established for residues of cephapirin in the milk and 0.1 ppm in the uncooked edible tissues of dairy cattle.
A tolerance of 0.01 part per million is established for negligible residues of cloxacillin in the uncooked edible tissues of cattle and in milk.
Tolerances are established at 0.1 part per million for negligible residues of thiabendazole in uncooked edible tissues of cattle, goats, sheep, pheasants, and swine, and at 0.05 part per million for negligible residues in milk.
www.accessdata.fda.gov /scripts/cdrh/cfdocs/cfcfr/CFRSearch.cfm?CFRPart=556&showFR=1&subpartNode=21:6.0.1.1.15.2   (7356 words)

  
 Electronic Code of Federal Regulations:   (Site not responding. Last check: 2007-11-05)
A tolerance of 0.02 parts per million (ppm) is established for residues of cephapirin in the milk and 0.1 ppm in the uncooked edible tissues of dairy cattle.
A tolerance of 0.01 part per million is established for negligible residues of cloxacillin in the uncooked edible tissues of cattle and in milk.
Tolerances are established at 0.1 part per million for negligible residues of thiabendazole in uncooked edible tissues of cattle, goats, sheep, pheasants, and swine, and at 0.05 part per million for negligible residues in milk.
ecfr.gpoaccess.gov /cgi/t/text/text-idx?c=ecfr&sid=9e33b8d5d60098eeca1baf364cdbf6ca&rgn=div5&view=text&node=21:6.0.1.1.15&idno=21   (7828 words)

  
 Super-Grow Parts Per Million (PPM) Calculator
PPM (parts per million) means how much of the solution is made up of the product.
For example, 1000 PPM means that out of one million parts one thousand is the product.
It is only meant to inform users on what has been generally reported in the user and scientific community and Super-Grow advises all users to review the information that it reports.
www.super-grow.biz /PPM.jsp   (256 words)

  
 Kids.Net.Au - Encyclopedia > Part per million
Parts per million (ppm) is a measure of concentration that is used where low levels of concentration are significant.
The ppm value is equivalent to the absolute fractional amount multiplied by one million (10
one gram in a metric tonne (one ppm by mass)
www.kids.net.au /encyclopedia-wiki/pa/Part_per_million   (100 words)

  
 Phthalates Information Center -- Did You Know?
Taking that further, a part per trillion is a million times smaller than that credit card on the football field, for example, or 6 feet out of a journey of six round trips to the sun (Editor's note: 95 million miles one way to the sun).
Normally scientists talk in terms of “milligrams (of material ingested) per kilogram (of body weight).” A milligram is one thousandth of a gram (a gram is about 3/100 of an ounce), and a kilogram is one thousand grams (or about 2 pounds).
This is the equivalent of 1 part per million.
www.phthalates.org /didyouknow/ppm.asp   (595 words)

  
 Activity 24 Teacher Guide: Mixing Ratios or Parts per Million, Billion
This amount is called one to ten parts per million (ppm).
With gases in the atmosphere, we usually think in terms of volume and may express this as parts per million by volume (ppmv).
Students will understand that a mixing ratio is the concentration of a certain substance expressed in parts per million or parts per billion by volume.
www.ucar.edu /learn/1_5_2_24t.htm   (1105 words)

  
 Glossary: Parts per million
Parts per million (ppm) is the number of units of mass of a contaminant per million units of total mass.
ppm (or ppmm) is used to measure the concentration of a contaminant in soils and sediments.
ppm (or ppmm) is also sometimes used to describe small concentrations in water, in which case 1 ppm is equivalent to 1 mg/l because a liter of water weighs approximately a 1000 g.
www.greenfacts.org /glossary/pqrs/parts-per-million-ppm.htm   (201 words)

  
 Parts-per notation Summary
The expression may be on either a mass or a volume basis, or a combination of the two, such as micrograms of a chemical per kilogram of soil, or micrograms of chemical per liter of water.
Parts-per notations (in particular ppm) are also used to specify the size of the errors of very precise measurements of gas pressure [1] and voltage stability [2].
A milligram is one part per million of a kilogram thus, one part per million (ppm) by mass is the same as one milligram per kilogram.
www.bookrags.com /Parts-per_notation   (1424 words)

  
 Parts Per Million   (Site not responding. Last check: 2007-11-05)
Part per million (ppm), part per billion (ppb), and par per trillion (ppt) are the most commonly used terms to describe very small amounts of contaminants in our environment.
However, if there was a contaminant in the pie at a level of a part per billion, one of these final invisible pieces of pie would be made up of the contaminant and the other 999,999,999 pieces would be pure pie.
Since we know that a part per trillion is a million times less than a part per million, we can see that the maximum allowable concentration of PCBs in fish is about a million times higher than the level of PCBs in drinking water.
www.sleekhome.com /help/Parts-Per-Million-38920.htm   (688 words)

  
 Journey North
For example, 1 ppm of a chemical in water means that, in a million units of water, there would only be one unit of the chemical.
That means one part per million is the same as one drop of a substance in a million drops, or 50 liters, of water.
And because there are 3.78 liters in a gallon, one part per million is also the same as one drop of a substance in about 13.2 gallons of water.
www.learner.org /jnorth/tm/PPM.html   (570 words)

  
 Wheeling Water Department -- Definitions
Parts per million (ppm) - one part per million corresponds to one minute in two years, or a single penny in $10,000.
Parts per billion (ppb) - one part per billion corresponds to one minute in 2,000 years, or a single penny in $10,000,000.
Parts per trillion (ppt) - one part per trillion corresponds to one minute in 2,000,000 years, or a single penny in $10,000,000,000.
www.wheelingwater.com /definitions.htm   (288 words)

  
 North Shore Water Commission 1998 Drinking Water Quality Report - Page 2   (Site not responding. Last check: 2007-11-05)
Parts per billion (ppb) or Micrograms per liter - one part per billion corresponds to one minute in 2,000 years, or a single penny in $10,000,000.
Parts per trillion (ppt) or Nanograms per liter (nanograms/l) - one part per trillion corresponds to one minute in 2,000,000 years, or a single penny in $10,000,000,000.
Parts per quadrillion (ppq) or Picograms per liter (picograms/l) - one part per quadrillion corresponds to one minute in 2,000,000,000 years or one penny in $10,000,000,000,000.
www.village.whitefish-bay.wi.us /newslett/nswc98p2.htm   (452 words)

  
 [No title]
One part per million is one pinch of salt in 20lbs of potato chips
One part per billion is one pinch of salt in 10 tons of potato chips
One part per trillion is a six inch step on a journey to the sun
www.sowashco.k12.mn.us /lake/PK/html/million.html   (122 words)

  
 Reducing Potential Cancer Risks from Drinking Water Part I
Part I (#7a) of this fact sheet provides a brief background regarding drinking water standards, sources of contaminants, and general cancer risks associated with exposure to certain drinking water contaminants.
Part II (#7b) of this fact sheet discusses several home water treatment options for reducing exposure to certain chemicals in drinking water, including some contaminants that are known or suspected to cause cancer in humans.
Part II (#7b) of this fact sheet discusses several home water treatment options for reducing exposure to certain chemicals in drinking water, including some contaminants that are known or suspected carcinogens.
envirocancer.cornell.edu /FactSheet/Pesticide/fs7a.drnkwtr.cfm   (2561 words)

  
 Parts Per Million Lab   (Site not responding. Last check: 2007-11-05)
To develop an understanding of the concept of parts per million (ppm) as a unit of measurement.
Today scientists are able to detect some materials at a parts per billion or even parts per trillion concentration.
This concentration is 1/10, one part per ten.
members.cox.net /bennowak/environment/envla/ppmlab.htm   (730 words)

  
 Parts Per Million
One part per trillion is a six inch leap on a journey to the sun!
One part per trillion is a postage stamp on an area the size of Texas!
One part per trillion is approximately one error among all the words of all the front page stories in all the issues of more than 2,000 daily newspapers in the United States if their publication had started with the invention of moveable type for the printing press!
www.keystonecurriculum.org /html/parts_per_million.html   (775 words)

  
 Parts Per Million (ppm) Converter
The use of ppm therefore has to be specified in the input fields below, in the way it should convert the value with the proper unit.
In air pollution literature ppm applied to a gas, always means parts per million by volume or by mole.
One part per million (by volume) is equal to a volume of a given gas mixed in a million volumes of air:
www.lenntech.com /calculators/converter-parts-per-million.htm   (816 words)

  
 What is the Significance of a Part Per Million?
Think of these concentration measures as being like a percentage--just as 1 percent is one part of a hundred, 1 ppm is one part of one million.
If he detects 1 ppm, then this would be equal to one ounce of the chemical per 1 million ounces (7,812.5 gallons) of Lake Okeechobee's water.
Therefore 1 ppm is equivalent to 1 mg/L; 1 ppb would equal 1 µg/L, and 1 ppt is 1 ng/L. As an example, one kg (2.2 lbs) of material in 1,000 metric tons (2.2 million lbs.) would be equivalent to 1 ppm., since there are 1,000 kg in one metric ton.
edis.ifas.ufl.edu /PI116   (1105 words)

  
 Approximate Chemical Concentration in parts per million (ppm)
Concentration is often expressed by the numbers of parts per million of the chemical in the solution.
An approximation to this is given by equating the concentration ratio to the number of parts per million (N).
N ppm is always written as N/1,000,000 in calculations.
www.grow.arizona.edu /water/waterquality/ppm.shtml   (405 words)

  
 help me @ phila.gov database   (Site not responding. Last check: 2007-11-05)
1 part per million is similar to making a line of quarters from Center City to Conshohocken, and then walking that line to find the one quarter that is flipped up heads instead of tails.
1 part per billion is equal to 1 green apple in a barrel containing 1 billion red apples.
1 part per trillion is similar to 1 inch in 16,000,000 miles or 1 penny in 10,000,000,000 dollars.
www.phila.gov /faqs/default.asp?Action=Q&ID=682   (198 words)

  
 The Environmental Literacy Council - Parts Per Million
In this activity, the concept of parts per million, a unit of measurement, will be investigated.
Today scientists are able to detect some materials at a parts per billion or even parts per trillion concentration.
This concentration is 1/10, one part per ten.
www.enviroliteracy.org /article.php?id=121   (785 words)

  
 Code of Federal Regulations: 21 CFR 178 INDIRECT FOOD ADDITIVES: ADJUVANTS, PRODUCTION AIDS, AND SANITIZERS
No use of hydrogen peroxide solution in the sterilization of food packaging material shall be considered to be in compliance if more than 0.5 part per million of hydrogen peroxide can be determined in distilled water packaged under production conditions (assay to be performed immediately after packaging).
Use of these sanitizing solutions shall be limited to conditions of water hardness not in excess of 300 parts per million.
Finished polymers having a density less than 0.94 gram per cubic centimeter shall be used in contact with food only under conditions of use B through H described in table 2 of Sec.
vm.cfsan.fda.gov /~lrd/FCF178.html   (11111 words)

  
 Superfund for Students and Teachers - Environmental Protection Agency
If the conversion of units leads to a fraction with a numerator other than 1, a different method can be used to determine parts per million or parts per billion.
To express the decimal answer in parts per million, move the decimal point 6 places to the right.
To express the answer in parts per billion, move the decimal point 9 places to the right.
www.epa.gov /superfund/students/clas_act/haz-ed/numwsht.htm   (567 words)

  
 Parts Per Million
Part per million (ppm), part per billion (ppb), and
millionth, or part per million, of the original pie.
Thus, a part per billion of the pie would be
web1.msue.msu.edu /msue/imp/mod02/01500585.html   (662 words)

  
 al.com: Special Report
In May of this year, the FDA reported the average methylmercury concentration in 60 samples of tilefish was 1.45 parts per million.
More than 15 million pounds of swordfish were brought to port by U.S. fishermen in 1999, even though FDA documents show that methylmercury levels in swordfish average 1 part per million.
Register research shows that FDA does, in fact, use the 1 part per million standard as a basis for taking legal action, at least when it comes to fish brought in by importers.
www.al.com /specialreport/mobileregister/index.ssf?merc29.html   (2106 words)

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