Difference between revisions of "Concentration"
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== Total concentration == | |||
# The '''total concentration''' of a substance (e.g. ADP) must be distinguished from the concentration of a specific ionic species (e.g. ADP<sup>4-</sup>, MgADP<sup>2-</sup>, MgHADP<sup>-</sup>). | |||
# The '''total concentration''' of a substance must be distinguished from the free concentration, if unspecific binding occurs to membranes (e.g. [[TPP]]) or if a substance is bound to BSA (e.g. fatty acids). | |||
# The '''concentration''' of a substance (''c'') differs from the activity (''a''), except at very high dilution. The activity of dissolved gases is expressed as the partial pressure (e.g. ''p''<sub>O2</sub>). The ratio of concentration (e.g. ''c''<sub>O2</sub> [µM]) and partial pressure (e.g. ''p''<sub>O2</sub> [kPa]) is the solubility (see [[oxygen solubility]]). | |||
Revision as of 12:37, 10 June 2014
- high-resolution terminology - matching measurements at high-resolution
Concentration
Description
Concentration {quote}:
1. Group of four quantities characterizing the composition of a mixture with respect to the volume of the mixture (mass, amount, volume and number concentration).
2. Short form for amount (of substance) concentration (substance concentration in clinical chemistry).
{end of quote: IUPAC Gold Book}
Abbreviation: c
Reference: IUPAC Gold Book
MitoPedia topics: Enzyme, Media for respirometry, Inhibitor, Substrate and metabolite, Uncoupler, Permeabilization agent
Total concentration
- The total concentration of a substance (e.g. ADP) must be distinguished from the concentration of a specific ionic species (e.g. ADP4-, MgADP2-, MgHADP-).
- The total concentration of a substance must be distinguished from the free concentration, if unspecific binding occurs to membranes (e.g. TPP) or if a substance is bound to BSA (e.g. fatty acids).
- The concentration of a substance (c) differs from the activity (a), except at very high dilution. The activity of dissolved gases is expressed as the partial pressure (e.g. pO2). The ratio of concentration (e.g. cO2 [µM]) and partial pressure (e.g. pO2 [kPa]) is the solubility (see oxygen solubility).
