Edit page | Page history | Printable version

Buffer

(Science: biochemistry, chemistry) a system that acts to minimise the change in concentration of a specific chemical species in solution against addition or depletion of this species.

ph buffers: weak acids or weak bases in aqueous solution. The working range is given by pKa _/ 1.

metal ion buffers: a metal ion chelator for example edta, partially saturated by the metal ion acts, as a buffer for the metal ion.