https://doi.org/10.1351/goldbook.S06023
The , of a component B in a system is given by the expression: where is the is the volume of the system. The component added to the system may dissociate or react with other components to form a series of derived components and only a fraction of the original component may actually exist in a free form in the system. It is therefore essential to distinguish between the ), e.g. , . In clinical chemistry, the term
stoichiometric
concentration, stoichiometric
amount of substance
of component B in the system and stoichiometric
concentration and the amount-of-substance concentration
of the free form of the component in the system. Sometimes stoichiometric
quantities are indicated by a subscript (stoichiometric
concentration is rarely employed. Instead, the name of the component is modified to indicate inclusion of the various derived forms, e.g. mixtures of a defined chemical component and its derivatives may be denoted by the plural form of the name of the pure unchanged substance, or to indicate the sum of components specified in individual quantities the specification 'total' may be employed.