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:

Directory of scientists: Maciej Jarosz
Flow-injection inductively coupled plasma mass spectrometry for speciation analysis | EVISA's News
Instrument database: Anton Paar GmbH - Multiwave 3000 (Microwave digestion system)
Directory of scientists: Pawel Pohl
Link database: US EPA Method 0061: Determination of Hexavalent Chromium Emissions from Stationary Sources
Directory of scientists: Dimiter L. Tsalev
Ultratrace determination of methylmercury in seawater using automated GC-AFS | EVISA's News
Instrument database: PerkinElmer Inc. - TurboMatrix Automated Headspace Samplers HS-110/HS-16/HS-40
Directory of scientists: Alan G. Howard
Directory of scientists: Carlos Bendicho Hernández
Analytical Forum 2004 | EVISA's Agenda of Events
Instrument database: Tekran Instruments Corporation - Series 3300 Speciating Mercury CEM - Overview
ICFIA 2011: 17th International Conference on Flow Injection Analysis | EVISA's Agenda of Events
Journals database: Microchimica Acta
Directory of scientists: Diane Beauchemin
Solid-phase extraction in speciation analysis | EVISA's News
CANAS'09: Colloquium Analytical Atomic Spectroscopy | EVISA's Agenda of Events
Tellurium Speciation Analysis of Soil Samples Taken from an Area Associated with the Storage, Processing, and Recovery of Electrowaste | EVISA's News
Analysis of perfluorinated compounds by HPLC-ICP-MS/MS | EVISA's News
17th Annual International Ion Chromatography Symposium | EVISA's Agenda of Events