Porous Graphitic Carbon as Stationary Phase for LC−ICPMS Separation of Arsenic Compounds in Water

Autor:	Gérard Crétier, J. L. Rocca, Jean-Michel Mermet, Nicole Gilon, S. Mazan
Rok vydání:	2002
Předmět:	Detection limit Chromatography Formic acid Analytical chemistry Arsenate chemistry.chemical_element Mass spectrometry Analytical Chemistry chemistry.chemical_compound Adsorption chemistry Graphite Arsenic Arsenite
Zdroj:	Analytical Chemistry. 74:1281-1287
ISSN:	1520-6882 0003-2700
Popis:	A new liquid chromatographic separation method was developed for the speciation of the four main arsenic compounds present in water. Arsenite (As(III)), dimethylarsinic acid (DMA), monomethylarsonic acid (MMA) and arsenate (As(V)) were separated on a recently introduced stationary phase: porous graphitic carbon (PGC). The separation was first obtained under formic acid gradient conditions, but an adsorption phenomenon of As(V) on PGC was observed. To overcome this problem, As(V) was backflushed, and an efficient separation of the four solutes was achieved within 10 min. Extremely low detection limits (ranging from 10 to 70 ng x L(-1)) were obtained by coupling LC with an ICPMS. The method was successfully applied to different spiked mineral waters and a naturally arsenic-containing freshwater.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::be3e2fba3ed1c7ce763e330d18860cd7 https://doi.org/10.1021/ac010823m Zobrazit plný text záznamu