Evaluation of inductively coupled plasma optical emission spectrometers with axially and radially viewed configurations

Content Provider	Semantic Scholar
Author	Silva, Fernando Bruno Vieira Da Trevizan, Lílian Cristina Silva, C. S. B. Nogueira, Ana Rita Nóbrega, Joaquim Araújo
Copyright Year	2002
Abstract	The analytical performance of two inductively coupled plasma optical emission spectrometers with axially and radially viewed configurations, equipped with charge coupled device solid-state detectors was evaluated using Ar, Ba, Mg, and Ni as test elements. Both instruments have similar Echelle optical arrangements and radio-frequency generators, differing only in the viewing mode and in the diameter of the central injector tube, i.e. 2.3 for the axially and 1.4 mm for the radially viewed ICP. The figures of merit evaluated were: warm-up time, shortand long-term stabilities, UV and VIS spectral resolution and limit of detection (LOD) for Ni in 0.14 mol l HNO and 1000 y1 3 mg l Cr media, respectively. The influence of residual carbon content on background equivalent concentration y1 (BEC) and sensitivity attained for Al, As, Ca, Cd, Co, Cr, Cu, Fe, Mg, Mn, Se and Zn was also investigated in both viewing modes. The robustness, shortand long-term stabilities, and UV and VIS spectral resolutions were similar for both configurations. For the radially viewed equipment, the warm-up time was at least a factor of 2 shorter than that for the axially viewed configuration. On the other hand, the sensitivity attained for Ni with the axially viewed arrangement was approximately 20 times better than that with the radially viewed. In both viewing modes, and for most of the evaluated elements, the values of BEC and LOD were similar for all studied carbon concentrations (f om 10 to 10 000 mg l C) when working with robust plasma conditions. The Mg II yMg I ratio at an applied power of y1 1.3 kW and a nebulizer gas flow-rate of 0.90 and 0.70 l min for axially and radially viewed configurations were y1 10.6 and 13.7, respectively. Quantitative determinations were successfully performed using both systems. 2002 Elsevier Science B.V. All rights reserved.
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Language	English
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Content Type	Text
Resource Type	Article