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Descriptor in English: Ions
Descriptor in Spanish: Iones
Descriptor in Portuguese: Íons
Descriptor in French: Ions
Tree number(s): D01.248.497
Scope note: An atom or group of atoms that have a positive or negative electric charge due to a gain (negative charge) or loss (positive charge) of one or more electrons. Atoms with a positive charge are known as CATIONS; those with a negative charge are ANIONS.
Annotation: avoid: too general; GEN; ionization chamber: index under RADIOMETRY /instrum
Allowable Qualifiers: AD administration & dosage
AE adverse effects
AG agonists
AI antagonists & inhibitors
AN analysis
BL blood
CF cerebrospinal fluid
CH chemistry
CL classification
CS chemical synthesis
EC economics
HI history
IM immunology
IP isolation & purification
ME metabolism
PD pharmacology
PK pharmacokinetics
PO poisoning
RE radiation effects
SD supply & distribution
ST standards
TO toxicity
TU therapeutic use
UR urine
DeCS UI: 7645
Descriptor UI: D007477
Date Established: 1966/01/01
Date of Entry: 1999/01/01
Revision Date: 2000/06/22
Ions - Preferred
Concept UI M0011678
Scope note An atom or group of atoms that have a positive or negative electric charge due to a gain (negative charge) or loss (positive charge) of one or more electrons. Atoms with a positive charge are known as CATIONS; those with a negative charge are ANIONS.
Preferred term Ions



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