Hofmeister series


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Hof·mei·ster ser·ies

(hof'mī-stĕr),
the series of cations Mg2+, Ca2+, Sr2+, Ba2+, Li+, Na+, K+, Rb+, Cs+, and of anions citrate3-, tartrate2-, SO42-, acetate-, NO3-, CIO3-, I-, CNS- (among others), each series arranged in order of decreasing ability to: precipitate the dispersed substance of lyophilic sols; "salt out" organic substances (for example, aniline, ethyl acetate) from aqueous solutions; or inhibit the swelling of gels. These effects, among other related ones, are ascribable to the abstraction and binding of water by these ions (that is, hydration), which also decreases in the orders given, so that (in the monovalent cation series) Li+, with the smallest crystal radius, has the largest hydrated radius, and vice versa for Cs+.
Synonym(s): lyotropic series
[Franz Hofmeister]

Hofmeister,

Franz, German biochemist, 1850-1922.
Hofmeister series - a series of cations and of anions. Synonym(s): lyotropic series
References in periodicals archive ?
The influence of inorganic aqueous salt solutions on synthetic or natural hydrophilic polymeric materials can be deduced from the Hofmeister series.
The Hofmeister series (23) ranks the tendency of different salts to perturb the denaturation temperature of proteins.
The effect of ions of the Hofmeister series on the LCST of IPAM-100 (24) is discussed in the accompanying paper (8).