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:

New certified reference material supporting mercury speciation analysis of blood | EVISA's News
Link database: Toxipedia: Lead
Company database: World Gold Council
Company database: Tecan
Preservation of arsenic speciation in natural water samples for up to three months | EVISA's News
Company database: Association of Exploration Geochemists
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
Is methyl mercury limiting the delight of seafood ? - To answer this question is a challenge for elemental speciation analysis | EVISA's News
New sensitive method for chromium speciation analysis: No hexavalent chromium in dairy and cereal products | EVISA's News
New arsenic species found in electronic cigarettes | EVISA's News
Material database: National Research Council of Canada (NRC - CNRC) - PACS-2
Decreased risk of colorectal cancer linked with higher selenium status | EVISA's News
Speciation and Toxicity | EVISA's News
Journals database: Journal of the Marine Biological Association of the United Kingdom
Speciation matters even if the interest is in total element concentration | EVISA's News
USGS Study Reveals Mercury Contamination in Fish Nationwide | EVISA's News
Instrument database: PerkinElmer Inc. - Spectrum Spotlight 200 FTIR Microscope System
How did elemental speciation develop ?
Company database: Association of Lab Managers (ALMA)
The retention of gadolinium in the human body following the use of gadolinium-based MRI contrast agents: a call to action for analytical chemists | EVISA's News