PPB

PPB can stand for:

  • Production-possibility boundary, a graph that shows the different quantities of two goods that an economy could efficiently produce with limited productive resources
  • Party political broadcast, a type of political programming in the United Kingdom
  • parts per billion, a unit of concentration
  • Portland Police Bureau, a police agency for the city of Portland
  • Partido Progressista Brasileiro, former name of Progressive Party of Brazil
  • Pirate Party of Brazil
  • Pirate Party of Belgium
  • Pirate Party of Bulgaria
  • Pleuropulmonary blastoma, a type of lung cancer
  • Plasma protein binding, a factor contributing to the efficacy of a pharmacological agent

Other articles related to "ppb":

Greenhouse Gas - Natural and Anthropogenic Sources
... Abbreviations used in the two tables below ppm = parts-per-million ppb = parts-per-billion ppt = parts-per-trillion W/m2 = watts per square metre Current greenhouse gas concentrations Gas Pre-1750 tropospheric concentration Recent tropospheric concentration Absolute increase since 1750 Percentage increase since 1750 Increased radiative forcing (W/m2) Carbon dioxide (CO2) 280 ppm 392.6 ppm 112.6 ppm 40.2% 1.85 Methane (CH 4) 700 ppb 1874 ppb / 1758 ppb 1174 ppb / 1058 ppb 167.7% / 151.1% 0.51 Nitrous oxide (N 2O) 270 ppb 324 ppb / 323 ppb 54 ppb / 53 ppb 20.0% / 19.6% 0.18 Tropospheric ozone (O 3) 25 ppb 34 ppb 9 ppb 36% 0.35 Relevant to radiative forcing and/or ozone depletion all of the following have no natural sources and hence zero amounts pre-industrial Gas Recent tropospheric concentration Increased radiative forcing (W/m2) CFC-11 (trichlorofluoromethane) (CCl 3F) 238 ppt / 236 ppt 0.060 CFC-12 (CCl 2F 2) 531 ppt / 529 ppt 0.17 CFC-113 (Cl 2FC-CClF 2) 75 ppt / 75 ppt 0.024 HCFC-22 (CHClF 2) 226 ppt / 203 ppt 0.041 HCFC-141b (CH 3CCl 2F) 23 ppt / 20 ppt 0.0025 HCFC-142b (CH 3CClF 2) 23 ppt / 21 ppt 0.0031 Halon 1211 (CBrClF 2) 4.2 ppt / 4.0 ppt 0.001 Halon 1301 (CBrClF 3) 3.3 ppt / 3.2 ppt 0.001 HFC-134a (CH 2FCF 3) 68 ppt / 58 ppt 0.0055 Carbon tetrachloride (CCl 4) 86 ppt / 84 ppt 0.012 Sulfur hexafluoride (SF 6) 7.47 ppt / 7.09 ppt 0.0029 Other halocarbons Varies by substance collectively 0.021 Ice cores provide evidence for greenhouse gas concentration variations over the past 800,000 years (see the following section) ... Both CO2 and CH 4 vary between glacial and interglacial phases, and concentrations of these gases correlate strongly with temperature ...
Bulk Leach Extractable Gold - Analysis
... large sample weights and solvent extraction enables low detection limits, as low as 0.1 ppb ... The digest is analyzed for Au (0.01 ppb), Cu (0.01 ppm), Ag (0.5 ppb), and depending on situations, for other elements ...
Drinking Water Quality In The United States - Substances For Which There Are Federal Standards - Arsenic
... the former Maximum Contaminant Level of 50 parts per billion (ppb) every day over a lifetime, there is a risk of cancer ... EPA reduced this level to 10 parts per billion (ppb) in 2002 and drinking water systems had to comply with the new regulation starting in 2006 ... National Research Council estimates that men and women who daily consume water containing 20 ppb of arsenic have about a 0.7% increased risk of developing bladder or lung cancer during their ...
Benzene In Soft Drinks - Limit Standards in Drinking Water
... The following limits are given in parts per billion (ppb μg/kg) ... World Health Organization (WHO) 10 ppb (WHO notes that benzene should be avoided whenever technically feasible.) Republic of Korea (South Korea) 10 ppb Canada 5 ppb United States 5 ppb European Union 1 ppb ...