Determination of chloride, sulfate and nitrate in drinking water by microchip electrophoresis

Autor:	Peter Troška, Heinz-Martin Kuss, Benjamin Bomastyk, Róbert Bodor, Marián Masár, Ladislav Danč, Michal Horčičiak
Rok vydání:	2012
Předmět:	Detection limit Analyte Chromatography Chemistry Inorganic chemistry Chemie Electrolyte Chloride Analytical Chemistry law.invention chemistry.chemical_compound Nitrate Ionic strength law medicine Sulfate Filtration medicine.drug
Zdroj:	Microchimica Acta. 177:309-316
ISSN:	1436-5073 0026-3672
DOI:	10.1007/s00604-012-0788-3
Popis:	We report on a method for simultaneous determination of chloride, sulfate and nitrate in drinking water by microchip electrophoresis. By adjusting a pH value of 4.2 in the aspartate background electrolyte, and by applying separation mechanisms via the ionic strength effect (bis-tris propane) and association equilibria (N-dodecyl-N,N-dimethyl-3-ammonio-1-propanesulfonate), a complete resolution of analytes from other co-migrating constituents is accomplished. In addition, isotachophoretic preconcentration of nitrate was implemented directly on the microchip. The ions were detected via conductivity measurements after injecting 900-nL samples. The limits of detection range from 40 to 120 μg L-1. The method displays a high reproducibility of the migration velocities under suppressed hydrodynamic and electroosmotic flow and therefore allows for a precise quantitation of analytes. The total analysis time is
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2a1eadd4fc28b5e446a164b68f419afd https://doi.org/10.1007/s00604-012-0788-3 Zobrazit plný text záznamu Plný text ve formátu PDF