analytical procedure to increase the concentration of analytes in the analytical solution in comparison with that present in the original sample. The techniques used include cryofocussing, gas-solid extraction, solid-phase extraction (SPE), solid-phase microextrraction (SPME), solvent extraction and evaporation.

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

Determination of methylmercury complexes with low molecular mass thiols | EVISA's News
An easy way to selectively determine organomercury in seafood | EVISA's News
Directory of scientists: Maďté Bueno
Instrument database: PerkinElmer Inc. - TurboMatrix Automated Headspace Samplers HS-110/HS-16/HS-40
Instrument database: Tekran Instruments Corporation - Series 3300 Speciating Mercury CEM - Overview
Chromium speciation by magnetic solid phase extraction on-line with inductively coupled plasma optical emission spectrometry | EVISA's News
Determination of arsenic species in water by means of capillary electrophoresis coupled to electrospray mass spectrometry | EVISA's News
Ultratrace determination of methylmercury in seawater using automated GC-AFS | EVISA's News
Determination of gadolinium-based MRI contrast agents in fresh and oceanic waters of Australia | EVISA's News
Journals database: Microchimica Acta
CANAS'09: Colloquium Analytical Atomic Spectroscopy | EVISA's Agenda of Events
ICFIA 2011: 17th International Conference on Flow Injection Analysis | EVISA's Agenda of Events
Flow-injection inductively coupled plasma mass spectrometry for speciation analysis | EVISA's News
Instrument database: Mercury Instruments GmbH - UT-3000 Mercury Ultratracer
Directory of scientists: Carlos Bendicho Hernández
Solid-phase extraction in speciation analysis | EVISA's News
The role of electrochemical techniques for speciation analysis | EVISA's News
Instrument database: Tekran Instruments Corporation - Model 2500 CVAFS Mercury Detector
Instrument database: Elemental Scientific Inc. (ESI) - seaFAST - Automated ICPMS Preconcentration System for Undiluted Seawater
Instrument database: Anton Paar GmbH - Multiwave 3000 (Microwave digestion system)