See "beneficiation." It also refers to the amount of a material in a host (e.g., the amount of gold in a ton of ore.)
Amount of a material per unit volume; i.e., milligrams per liter.
The amount or mass of a substance present in a given volume or mass of sample. Usually expressed as microgram per liter (water sample) or micrograms per kilogram (sediment or tissue sample).
(1) The weight of solids contained in a unit weight of boiler or feed water. (2) The number of times that the dissolved solids have increased from the original amount in the feedwater to that in the boiler water due to evaporation in generating steam.
The amount of one substance in another substance. For example, a concentration of 10 milligrams per liter means there are 10 milligrams of a substance in 1 liter of another substance.
the number of molecules per unit volume.
The quantity of vapor or aerosol suspended in a volume of air.
The quantity of one constituent dispersed in a defined amount of another.
the relative amount of a particular atom or molecule in a solution; a large amount is a high concentration; a small amount is a low concentration
The relative amount of a material in combination with another material. for example, 5 parts of (acetone) per million (parts of air).
The amount of a substance contained in a specific quantity of another solution or a mixture.
the amount of one material dispersed or distributed in a larger amount of another material
The amount of active ingredient or herbicide equivalent in a quantity of diluent expressed as percent, lb/gal, kg/L, etc.
In SUTRA, the mass fraction of solute in the fluid, or the mass fraction of adsorbate on the solid.
The total quantity of substance present in a given unit volume (of gas or liquid). It may be expressed in any unit or mass per unit of volume such as milligrams per cubic meter ( mg/m3) , grams per liter ( gm/L), or as volume per volume such as parts per million ( ppm).
A measure of the ratio of the amount of solute in a solution to the amount of either solvent or solution. Frequently expressed in units of moles of solute per liter of solution. See molarity.
a measurement of the amount of solute that is dissolved in a given quantity of solvent; the ratio between the amount of solute and the amount of solution. (see concentration unit)
In the context of air or water quality, the amount of a substance per unit (weight or volume) of air or water.
The relative amount of a substance mixed with another substance. Examples are 5 ppm of carbon monoxide in air and 1 mg/l of iron in water.
The amount of a substance in a defined volume of liquid.
the total mass of an ion or molecule in a given volume of solution (see: activity). When measuring ionic concentration by ion-selective electrodes, it is important to note that the concentration used in the calibration graphs and calculated for the samples is the concentration of the free ion in solution, not the concentration of the compound from which this ion is derived. A distinction must also be made between the concentration of the free unbound ions and the total concentration, which may include any ions, bound to complexing agents and any atoms in undissociated molecules.
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.
The amount of material in a given amount of water by weight, as used herein, sediment concentration is Kg of sediment per cubic meter of water. Expressed as a percentage, this is Kg of sediment per Kg of water times 100.
The amount of the compound present in a specified quantity of dilutant (i.e. water). Can be expressed as ml/L, oz/gallon, etc.
the amount of a substance in a stated unit of a mixture or solution. Common methods of stating concentration are per cent by weight, per cent by volume, or weight per unit volume (eg: parts per million, billion, etc.).
The amount of a specified substance in a unit amount of a cosmetic product, e.g. 25 g of “ingredient X†in “cosmetic Y†(total weight = 1000 g), means X is present at a concentration of 2.5% in cosmetic Y.
strengthening the concentration (as of a solute in a mixture) by removing extraneous material
an amount of pollution in the air over a given time period
a significantly large volume of economically related assets that an institution has advanced or committed to one person, entity, or affiliated group
the quantity of a dissolved substance in a solution.
The amount of a given substance in a stated unit of measure. Common methods of stating concentration are percent by weight or by volume, weight per unit volume, normality, etc.
The amount of substance in a specified space.
the mass of a chemical per volume of water - commonly expressed as milligrams per liter (mg/L), or micrograms per liter (ug/L).
the amount of solute dissolved in a specific amount of solvent at a certain temperature
The relative amount of one substance mixed into another substance.
The amount of material dissolved in a unit of solution, expressed in mg/L.
The amount of an active ingredient as a percent recommended in mixture or solution for application to animals or surfaces.
the process of separating a mineral from valueless host rock in preparation for further processing; also the amount of a substance in a given weight or volume of another material
The contribution of any one debtor to the total volume of debt owed to a client, expressed as a percentage. Any debtor who represents 20% or more of the outstanding debt owed to a client will raise concerns by a funder.
The amount of a specific substance dissolved in a given amount (volume) of another substance.
The amount of the substance contained per unit volume of a liquid.
the ratio of the amount of a specific substance in a given volume or mass of solution to the mass or volume of solvent.
The amount of active ingredient in a product. Concentration may be calculated either by weight or by volume.
Concentration refers to the amount of dissolved substances in a given solution. For instance, Quick Mix products are highly concentrated. This means that they can be diluted with high levels of water to produce effective cleaning products.
The amount of a specific substance mixed into a given volume of air or liquid.
The ratio of the mass or volume of a solute to the mass or volume of the solution or solvent.
The amount of a substance contained in a unit quantity of a sample.
Amount of a given test article in a given volume of air (e.g., mg/L, mg/m3, pr ppm) Can also be in water or other material.
The process of increasing the dissolved solids per unit volume of solution, usually by evaporation of the liquid; the quantity of solute dissolved in a unit volume of solution.
The quantifiable amount of chemical in the surrounding water, food or sediment.
The quantity of one substance contained in another substance e.g. the amount of salt dissolve in seawater
A measure of pesticide levels in an organism or medium. Usually expressed in parts per million (See ppm) or amount of pesticide (usually active ingredient) per weight of medium or per body weight of organism (e.g., mg/kg). See LC50.
The amount of active ingredient or pesticide equivalent in a quantity of diluent, expressed as lb/gal, ml/liter, etc.
A measurement of the content of one or more substances dispersed or dissolved in a material or metal working fluid.
How much or the amount of a substance present in a certain amount of soil, water, air, or food.
The amount of a material in the air, for example 50 parts per million (PPM). May also refer to the amount of a substance in a mixture, for example; 10 percent ammonia in water.
In chemistry, the concentration of a substance is a measure of its weight or volume compared to the unit weight or volume of the mixture. For example, "mg per liter."
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.
Amount of dust in the gas. Usually expressed in terms of grains/ cu ft, Ib/l000 Ib. of gas, ppm, mg/cu mt. or Ib/million Btu.
Synonymous with strength, it is determined by the ratio of water to the amount of coffee - mild, medium and strong.
The amount of a specified substance in a specific medium such as air or water.
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.
The amount of a specified substance in a given amount of another substance. For example, the concentration of salt in sea water is higher than the concentration of salt in fresh water.
The amount of a substance per unit volume of solution.
the amount of a species that is present in a specified amount of the medium in which it resides, e.g., one mole of sodium ions dissolved in one litre of water is termed 1 mol l-1, or 1 mol/l.
number of particles (e.g. in g or in mole) per volume of a substance
The amount of material contained in a unit volume of fluid. The term is also used for the process of increasing the dissolved material per unit volume.
The process of increasing solids per unit volume of solution, usually by evaporation of the liquid; also, the amount of material dissolved in a unit volume of solution. This occurs due to evaporation that cools the water. It is normally expressed directly as ppm or indirectly as mhos conductivity.
This amount of a substance found in another material.
The ratio of the amount of one substance in another substance. For example, in seawater, the amount of chloride dissolved in water is approximately 18,000 milligrams per liter.
A measure of the atmospheric content of a gas, defined in terms of the proportion of the total volume that it accounts for. Greenhouse gases are trace gases in the atmosphere and are usually measured in parts per million by volume (ppmv), parts per billion by volume (ppbv) or parts per trillion (million million) by volume (pptv).
the amount of material in a solution in relationship to the amount of solvent; expressed as the ratio. For example: 1:5 concentration means that 5 parts of an extract contains the equivalent of one part of the raw herb; 4:1 concentration means that 1 part of an extract contains the equivalent of 4 parts of the raw herb.
The amount of substance per unit mass or volume of the medium in which it occurs
The amount of air treatment agent or product in the air within an interior space where concentration can theoretically be maintained at a constant level. Usually expressed in parts per million (ppm) or grams per cubic meter (g/m 3 ).
The amount of a substance (solute) present in a given volume of solvent or solution.
The relative quantity of a component in a gas mixture. The ratio or proportion of a given component to the total quantity of gas mixture. The ratio is expressed in terms of concentration units (i.e. % or parts per hundreds, ppm or parts per million, ppb or parts per billion) and concentration basis (i.e. mol/mol, weight/weight). Scott Specialty Gases states concentrations on a mole basis, unless otherwise specified. For example: 10 ppm nitric oxide in a balance of nitrogen means that there are 10 moles of nitric oxide per million moles of total mixture of nitric oxide and nitrogen.
The amount of one substance mixed with another substance, usually stated as mass per volume (eg. mg/L or mg/m3), or volume per volume (ppm or percent).
Compare with dilution. A measure of the amount of substance present in a unit amount of mixture. The amounts can be expressed as moles, masses, or volumes. The process of increasing the amount of substance in a given amount of mixture.
Amount of a chemical in a particular volume or weight of air, water, soil, or other medium.
Ten thousand parts per million is equal to one percent.
The relative amount of a substance when combined or mixed with other substances. Examples: 2 ppm hydrogen sulfide in air, or a 50 percent caustic solution.
The amount of one substance in a given amount of another substance, such as the weight of a chemical in a liter of water or the number of animals in a cubic meter of space.
consentracion] the amount of a specified substance in a unit measure of another substance.
the amount of a substance per unit area or volume. Concentration is commonly used to refer to the amount of dopant in a semiconductor as atoms per area or volume, or to refer to elements added to materials to change the material properties, etc. May be in weight or atomic percent or number per unit area or volume.
Amount of dust in the gas. Usually expressed in terms of grains/cu ft., pounds/hour.
The amount of a substance in a given amount of air, soil or liquid.
The amount of one substance mixed or dissolved in a specified amount of a second substance.
The amount of a substance present in a certain amount of soil, water, air, food, blood, hair, urine, breath, or any other media.
1. The process of increasing the dissolved solids per unit volume of solution, usually by evaporation of the liquid or separation of the liquid by passage through a semipermeable membrane.
The amount of a chemical agent present in a unit volume of air, usually expressed in milligrams per cubic meter (mg/m3.)
In corrosives the amount of acid or base compared to the amount of water present. Corrosives have "strength" and "concentration." See Strength.
Crossflow filtration in which the desired substance (product) remains on the upstream side of the membrane (does not pass through). The opposite of diafiltration.
The amount of dust in gas. Usually expressed in terms of grains per ft3, lbs per 1,000 lbs of gas, parts per million or milligrams per cubic meter.
Amount of active ingredient contained in a unit volume or weight of a formulation or mixture.
In chemistry, concentration is the measure of how much of a given substance there is mixed with another substance. This can apply to any sort of chemical mixture, but most frequently the concept is limited to homogeneous solutions, where it refers to the amount of solute in a substance.