1. Apportionment of a solute between two phases. The terms parttion or extraction may also be used in this sense were appropriate.
2. Dispersal of a substance and its derivatives throughout the natural environment or throughout an organism.
3. Final location(s) of a substance within an organism after dispersal.

The term "distribution" was found in the following pages:

Stability of Reference Materials for Elemental Speciation Analysis | EVISA's News
Company database: Freund Publishing House Ltd.
Combined speciation analysis and elemental bioimaging provides new information about the retention of gadolinium in kidney following the application of some MRI contrast agents | EVISA's News
Company database: CCS Services SA
Company database: LGC Promochem GmbH
Company database: VGB PowerTech e.V.
Journals database: Water Quality Bulletin
Instrument database: Bruker Daltonics - solariX - Hybrid Qq-FTMS system
Methylmercury in European rice varies by more than a factor of 50 | EVISA's News
EPA Study: Mercury Levels in Women of Childbearing Age Drop 34 Percent | EVISA's News
Instrument database: Bruker Daltonics - HCT/HCTplus
Instrument database: Bruker Nano GmbH - M4 Tornado
New Study Finds: Thimerosal Induces Autism-like Neurotoxicity | EVISA's News
Toxic inorganic arsenic species found in Japanese seaweed food | EVISA's News
Instrument database: Teledyne CETAC Technologies - LSX-200 Plus - Laser ablation system
Lehigh University professor receives Astellas Award for arsenic groundwater remediation efforts | EVISA's News
Mercury in Fish: Groups Sue FDA for Seafood Health Information | EVISA's News
Mercury isotope fractionation provides new tool to trace the source of human exposure | EVISA's News
Huge Amounts of Toxic Mercury Found Hidden in the Arctic Permafrost | EVISA's News
Instrument database: Edax Inc. - Eagle III ÁProbe