Simultaneous determination of arsenic, antimony and selenium in agronomic samples by hydride generation and optical emission spectrometry.
Simultaneous determination of arsenic, antimony and selenium in agronomic samples by hydride generation and optical emission spectrometry.
Author(s): CRISPINO, C. C.; LEMOS, S. G.; KANOGAWA, M. Y.; NOGUEIRA, A. R. de A.
Summary: A continuous-fl ow hydride generation system was developed and used with inductively coupled plasma optical emission spectrometry (ICP OES) for simultaneous determination of As, Sb and Se in agronomic samples. A factorial design was applied in order to establish the best chemical and instrumental conditions. The factors chosen for evaluation were: reagent concentration, plasma power, carrier gas fl ow rate, and the viewing height of the plasma. The LODs of the method were 0.124, 0.168, and 0.141 ?g L-1 for As, Sb, and Se, respectively. The RSD (relative standard derivation) was lower than 1.8%, and the sampling throughput was 40 samples h-1 . To check the method accuracy, eight different kinds of agronomic samples - for- age, corn silage, mineral salt, and bovine-derived samples (blood, viscera, carcass, meat, and semen) - were spiked with different analyte concentrations (at the ?g L-1 level). Recoveries ranged from 90 to 102%.
Publication year: 2013
Types of publication: Journal article
Observation
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