ion-selective electrode

ion-selective electrode,

a potentiometric electrode that develops a potential in the presence of one ion (or class of ions) but not in the presence of a similar concentration of other ions.

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ion (ī´on),

n an atomic particle, atom, or chemical radical bearing an electrical charge, either negative or positive.

ion exchange chromatography,

n the process of separating and analyzing different substances according to their affinities for chemically stable but very reactive synthetic exchangers, which are composed largely of polystyrene and cellulose. The process uses an absorbent containing ionizing groups and accommodates the exchange of ions between a solution of substances to be analyzed and the absorbent. Ion exchange chromatography is often used to separate components of nucleic acids and proteins.

ion pair,

n the two particles of opposite charge, usually the electron and the positive atomic residue resulting after the interaction of ionizing radiation with the orbital electrons of atoms. The average energy required to produce an ion pair is approximately 33 (or 34) electron volts.

ion-selective electrode,

n a potentiometric electrode that develops a potential in the presence of one ion (or class of ions), but not in the presence of a similar concentration of other ions.