A chemical reaction in which a compound or radical loses electrons, that is in which the positive valence is increased.

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

Link database: Chemical Fact Sheet: Neptunium
Arsenic-eating bacteria rewrite evolutionary history | EVISA's News
CEST2017: 15th International Conference on Environmental Science and Technology | EVISA's Agenda of Events
Instrument database: OI Analytical - Aurora 1030W TOC Analyzer
Antimony mine disaster | EVISA's News
Mercury "speciation analysis" by using thermal desorption analysis | EVISA's News
Instrument database: Seiko Instruments Inc. - EXSTAR6000 TG/DTA Thermo-Gravimetric/Differential Thermal Analyzer
Directory of scientists: Vekoslava Stibilj
New sensitive method for chromium speciation analysis: No hexavalent chromium in dairy and cereal products | EVISA's News
CRMs for the speciation analysis of chromium in particulate materials | EVISA's News
New Study Examines Why Mercury is More Dangerous in Oceans | EVISA's News
Chromium Isotope Ratio as a Tool to Track the Redox State of the Earth | EVISA's News
Link database: Hexavalent Chromium Dangers
Link database: Chemical Fact Sheet: Strontium
Material database: Canadian Certified Reference Materials Project (CCRMP) - CCU-1c Copper Concentrate
Agilent Technologies publishes Handbook of Hyphenated ICP-MS Applications | EVISA's News
Mercury is converted to oxidized species in the upper atmosphere facilitating its entrance into the food chain | EVISA's News
Speciation matters even if the interest is in total element concentration | EVISA's News
Material database: Canadian Certified Reference Materials Project (CCRMP) - CZN-3 Zinc Concentrate
Link database: Chemical Fact Sheet: Beryllium