SOLID-PHASE EXTRACTION OF MERCURY (II) IN DRINKING WATER BY ALIQUAT 336 USING X-RAY FLUORESCENCE SPECTROMETRY

PEDRO ARANDA,; LEANDRO COLOMBO; SUSANA MOYANO; ERNESTO PERINO; JULIO RABA; IRMA DE VITO

Congreso; XIII LATIN AMERICAN SEMINARY OF ANALYSIS BY X-RAY TECHNIQUES ? SARX 2012; 2012

A novel and simple method was developed for the preconcentration and determination of mercury (II) from hydrochloric acid solutions through their adsorption on Aliquat 336 (tri-octyl methylammonium chloride)-AC (Activated Carbon). The determinations were made directly on the solid by X-ray fluorescence (XRF) spectrometry, which had the advantage of eliminating the step of elution of the mercury retained. This system of preconcentration enabled determination of Hg(II) in drinking water samples at µgL-1 levels. A 1700-fold EF was obtained. The described methodology showed excellent reproducibility and accuracy, allowed us to improve detection limits by eliminating the step of elution of the analyte, replacing those methods that are based on cold vapor generation, reducing reagent consumption and handling of samples.