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: Christian Dietz
Instrument database: Elemental Scientific Inc. (ESI) - seaFAST - Automated ICPMS Preconcentration System for Undiluted Seawater
17th Annual International Ion Chromatography Symposium | EVISA's Agenda of Events
Mercury isotope ratio measurements of methylmercury in fish | EVISA's News
Directory of scientists: Maďté Bueno
Non-chromatographic separation techniques for speciation analysis | EVISA's News
Instrument database: Tekran Instruments Corporation - Model 2500 CVAFS Mercury Detector
Instrument database: Metrohm AG - 861 Advance Compact IC with Sequential Compression
CANAS'09: Colloquium Analytical Atomic Spectroscopy | EVISA's Agenda of Events
5th Black Sea Basin Conference on Analytical Chemistry | EVISA's Agenda of Events
Directory of scientists: Pawel Pohl
Directory of scientists: Ralph Edward Sturgeon
Link database: US EPA Method 0061: Determination of Hexavalent Chromium Emissions from Stationary Sources
Instrument database: Tekran Instruments Corporation - Series 2600 Mercury Analysis System
Flow-injection inductively coupled plasma mass spectrometry for speciation analysis | EVISA's News
Directory of scientists: Carlos Bendicho Hernández
Directory of scientists: Alan G. Howard
Solid-phase extraction in speciation analysis | EVISA's News
Journals database: Microchimica Acta
ICFIA 2011: 17th International Conference on Flow Injection Analysis | EVISA's Agenda of Events