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:

Solid-phase extraction in speciation analysis | EVISA's News
Occurrence of Mercurous [Hg(I)] Species in Environmental Solid Matrices | EVISA's News
Instrument database: Tekran Instruments Corporation - Series 3300 Speciating Mercury CEM - Overview
Directory of scientists: Alan G. Howard
Determination of arsenic species in water by means of capillary electrophoresis coupled to electrospray mass spectrometry | EVISA's News
Directory of scientists: Maciej Jarosz
ICFIA 2011: 17th International Conference on Flow Injection Analysis | EVISA's Agenda of Events
Link database: US EPA Method 0061: Determination of Hexavalent Chromium Emissions from Stationary Sources
Directory of scientists: Maďté Bueno
Journals database: Microchimica Acta
Instrument database: Mercury Instruments GmbH - UT-3000 Mercury Ultratracer
17th Annual International Ion Chromatography Symposium | EVISA's Agenda of Events
Analytical Forum 2004 | EVISA's Agenda of Events
CANAS'09: Colloquium Analytical Atomic Spectroscopy | EVISA's Agenda of Events
Directory of scientists: Diane Beauchemin
Directory of scientists: Carlos Bendicho Hernández
Speciation of Germanium in Environmental Water Reference Materials by Hydride Generation and Cryotrapping in Combination with ICP-MS/MS | EVISA's News
Directory of scientists: Christian Dietz
Analysis of perfluorinated compounds by HPLC-ICP-MS/MS | EVISA's News
Instrument database: Elemental Scientific Inc. (ESI) - seaFAST - Automated ICPMS Preconcentration System for Undiluted Seawater