to preconcentrate analytes in chromatographic methods (e.g. high performance liquid chromatography (HPLC), gas chromatography (GC) adsorption chromatography), atomic absorption spectroscopy (AAS), inductively coupled plasma spectroscopy (ICP), X-ray fluorescence analysis;
om geanalyseerde stoffen te preconcentreren bij chromatografische methoden (b.v. hogedrukvloeistofchromatografie (HPLC), gaschromatografie (GC), adsorbtiechromatografie), atoomabsorptiespectroscopie (AAS), spectroscopie met inductief gekoppeld plasma (ICP), röntgenfluorescentieanalyse;