Title of article :
INFLUENCE OF THE MEASUREMENT MEDIUM AND MATRIX MODIFIERS ON THE DETERMINATION OF SILICON IN WATERS BY GRAPHITE FURNACE ATOMIC ABSORPTION SPECTROMETRY
Author/Authors :
EL HIMRI, MAMOUNE University Mohammed premier - Laboratory of chemistry and environnement, Morocco , EL HIMRI, ABDELOUAHAD Université Mohammed Premier - Ecole Nationale des Sciences Appliquées, Morocco , PASTOR, AGUSTÍN University of Valencia - department of analytical chemistry, Spain , DE LA GUARDIA, MIGUEL University of Valencia - department of analytical chemistry, Spain
Abstract :
An electrothermal atomic absorption (ETAAS) method has been developed for the direct determination of Si in natural waters. Measurements were carried out on previously alkalinized samples and using a mixture of Pd and Mg(NO3)2 as matrix modifier, with an ashing temperature of 1400 °C and an atomization temperature of 2400 °C. Transversally heated pyrolitically graphite tubes, equipped with L’vov platform and Zeeman effect correction, was employed in this study. A limit of detection of 2.6 μg/L Si was obtained and accuracy was evaluated by analyzing two Standard Reference Material at different concentration levels, a good agreement ( 5%) was obtained. This developed procedure was demonstrated of the need of using an alkaline medium for accurate Si determination by ETAAS.
Keywords :
Silicon determination , water analysis electrothermal atomic absorption spectrometry , effect of sample medium , effet of matrix modifier
Journal title :
Journal of Applied Sciences and Environmental Management
Journal title :
Journal of Applied Sciences and Environmental Management
