A negatively charged ion.

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

High Accumulation of Selenium in Wheat Grains | EVISA's News
Instrument database: Metrohm AG - 861 Advance Compact IC with Sequential Compression
Link database: US EPA Method 1636: Determination of hexavalent chromium by ion chromatography
Determination of Thallium Speciation in Water Samples by HPLC-ICP-MS | EVISA's News
Transformation of arsenic species during ultrasonic sample pretreatment | EVISA's News
ICP-MS Analysis Suggests Metal-Binding Proteins Significantly More Abundant Than Thought | EVISA's News
New selenium metabolites found in human serum | EVISA's News
Instrument database: Aurora Instruments Ltd. - Crysta 500 Water Purification System
Occurrence of Mercurous [Hg(I)] Species in Environmental Solid Matrices | EVISA's News
Instrument database: Dionex Corporation - ICS-900 Starter Line IC System
Link database: NEMI: ASTM Method D5257: Chromium, Hexavalent, in Water by Ion Chromatography
Elusive Hg(IV) species has been synthesized under cryogenic conditions | EVISA's News
High level of inorganic arsenic in blue mussels from Norwegian Fjords | EVISA's News
Bangladeshi scientists get prestigious award for arsenic filter | EVISA's News
Link database: EPA-EAD: Method 1636: Hexavalent Chromium by Ion Chromatography
Instrument database: GAT - Gamma Analysen- Technik GmbH - GAT DKK-TOA IA-200 Ion Analyzer Automat
Link database: Hazardous Substances Data Bank: Aluminum fluoride
Arsenic species in the Most Consumed Seafoods in the USA | EVISA's News
Link database: Chemical Transformations of Chromium in Soils: Relevance to Mobility, Bio-availability and Remediation
Instrument database: Metrohm AG - MIC-2 Advanced - Modular anion system with chemical suppression