Concentration

concentration /con·cen·tra·tion/ (kon?sen-tra´shun)

1. increase in strength by evaporation.

2. the ratio of the mass or volume of a solute to the mass or volume of the solution or solvent.

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hydrogen ion concentration  the degree of concentration of hydrogen ions in a solution; related inversely to the pH of the solution by the equation [H+]= 10-pH.

mass concentration  the mass of a constituent substance divided by the volume of the mixture, as milligrams per liter (mg/L), etc.

mean corpuscular hemoglobin concentration  (MCHC) the average hemoglobin concentration in erythrocytes.

molar concentration  the concentration of a substance expressed in terms of molarity; symbol c.

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con·cen·tra·tion (knsn-trshn)

n.

1. An increase of the strength of a pharmaceutical preparation by the extraction, precipitation, and drying of its crude active agent.

2. An increase in the strength of a fluid or gas in a mixture by purification, evaporation, or diffusion.

3. The amount of a specified substance in a unit amount of another substance.

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Concentration

Refers to the amount of solute present in a solution, compared to the total amount of solvent.

Mentioned in: Diabetes Insipidus

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concentration,

n the amount of a solute (substance) dissolved in a specific amount of solvent. This number may be represented as a percentage (%), grams per liter, or as a mole fraction.

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concentration

1. increase in strength by evaporation.

2. the ratio of the mass or volume of a solute to the mass or volume of the solution or solvent.

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hydrogen ion concentration

an expression of the degree of acidity or alkalinity (pH) of a solution. See also acid-base balance.

mass concentration

the mass of a constituent substance divided by the volume of the mixture, as milligrams per liter (mg/l).

minimum effective concentration

the threshold level of a drug in plasma below which the efficiency of the drug as a treatment drops off sharply.

molar concentration

the amount of a constituent in moles (millimoles or micromoles) divided by the volume of the mixture, as millimoles per liter (mmol/l).

concentration test

a test of renal function based on the patient's ability to concentrate urine. See water deprivation test.