Any combination of a cation associated with molecules or anions containing unshared pairs of electrons. The interaction can range from purely electrostatic to that approaching covalent character.

With respect to a complex we further define:

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

Instrument database: Thermo Scientific - ISQ™ EC Single Quadrupole Mass Spectrometer
Instrument database: Bruker Daltonics - maXis HD™ - UHR-TOF Mass Spectrometer
Determination of arsenic species in water by means of capillary electrophoresis coupled to electrospray mass spectrometry | EVISA's News
Link database: Rossendorf Expert System for Surface and Sorption Thermodynamics
Company database: Cerilliant Corporation
Instrument database: Shimadzu Europe - GCMS-TQ8030
Instrument database: ESA Inc. - CoulArray® - The Only Coulometric Array Detector for HPLC
Instrument database: Analytik Jena GmbH - contrAA® 800 D - Dual Atomizer Atomic Absorption Spectrometer
Instrument database: LUMEX Ltd. - Atomic Absorption Spectrometer MGA-1000
Company database: Büchi Labortechnik AG
Instrument database: GERSTEL GmbH & Co.KG - Automated Solid Phase Extraction (SPE)
Instrument database: Waters Corporation - Q-TOF API-US
Spatially resolved speciation analysis: A new technique based on laser ablation with simultaneous elemental and molecular mass spectrometry | EVISA's News
Material database: United States Pharmacopeial Convention (USP) - Chromium picolinate
Mercury Speciation Analysis of Dried Blood Spot Samples | EVISA's News
Instrument database: Agilent Technologies Inc. - 6560 Ion Mobility Q-TOF LC/MS
Link database: Encyclopedia of Earth: Thallium
Instrument database: Mass Spectrometry Instruments (MSI) - Autoconcept-High resolution mas spectrometer
Instrument database: Thermo Scientific - Velos Pro - Dual-Pressure Linear Ion Trap Mass Spectrometer
Instrument database: PerkinElmer Inc. - AAnalyst 600