Any one of a group of three quantities characterizing the composition of a mixture and defined as one of mass, amount of substance (chemical amount), or number divided by volume, giving, respectively, mass, amount (of substance), or number concentrations.

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

Instrument database: GBC Scientific Equipment Ltd. - INTEGRA XMP
Material database: The Food and Environment Research Agency (FAPAS) - Test Material T07139 (Canned Fish)
Material database: RECIPE Chemicals + Instruments GmbH - ClinCheck 8931 - Urine Control lyophilised for Arsenic Species
Material database: IAEA - MEL International Atomic Energy Agency - IAEA-407 Trace elements and methylmercury in fish tissue
Material database: The Food and Environment Research Agency (FAPAS) - Test Material T07119 (Soft Drink)
Component database: CSols Ltd - CSols LabCache™ – Laboratory Database
Thiomersal in influenza vaccine: more than just an adjuvant | EVISA's News
Directory of scientists: Janez Ščančar
Instrument database: Analytik Jena GmbH - multi EA® 2000 Elemental analyzer
Instrument database: Varian Inc. - Vista MPX Simultaneous ICP-OES
DFG presents the 2005 MAK and BAT value lists | EVISA's News
Material database: Food Analysis Performance Assessment Scheme (FAPAS) - Test Material T1862 (Canned Meat)
Instrument database: Thermo Scientific - ELEMENT-2
Fractionation as a first step towards speciation analysis | EVISA's News
New way of cooking rice removes arsenic and retains mineral nutrients, study shows | EVISA's News
The effect of thermal treatment on the arsenic speciation in food | EVISA's News
Instrument database: Chemito Instruments Pvt. Ltd. - AA201 Atomic Absorption Spectrophotometer
Toxicity of organomercury compounds | EVISA's News
Instrument database: Thermo Scientific - Finnigan LTQ FT Ultra Mass Spectrometer