Concentration 01
Concentration 01 : (a) The amount of one substance dissolved or contained in a given amount of another. For example, sea water contains a higher concentration of salt than fresh water. [ATSDR, 1999: Online Glossary] [New York Department of Health, 1999: Glossary of Environmental Health Terms]; (b) The amount of material in the air, eg., 50 parts per million. May also refer too the amount of a substance in a mixture, eg., 10% ammonia in water. [University of Kentucky, 1999: Glossary of Safety Terms]; (c) The relative amount of a substance mixed with another substance. An example is five ppm of carbon monoxide in air or 1 mg/l of iron in water. [USEPA, 1997a: EPA Terms of Environment]; (d) Amount of agent per unit volume [Zartarian, et al., 1997: Quant. Def. of Exp. & Related Concepts]
No records Found