Journal
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
Volume 64, Issue 3, Pages 247-254Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.sab.2009.02.008
Keywords
Inductively coupled plasma; Single droplet injection; Analyte atomization; Plasma parameters; Matrix effects
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Funding
- Deutsche Forschungsgemeinschaft
- Ministry of Innovation, Science, Research and Technology of the state Northrhine-Westphalia
- Ministry of Education and Research of the Federal Republic of Germany
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Monodisperse droplets from aqueous analyte Solutions with selected diameters in the range 35-67 mu m are introduced into an inductively coupled plasma with frequencies between 1 to 10 droplets per second. The effect of desolvation and atomization in the ICP is Studied end-on by optical emission spectroscopy employing simultaneously Lip to three calibrated monochromators with fast photomultipliers, The onsets of desolvation and analyte atomization and the extremely fast diffusion of hydrogen in the ICP and its effect oil the plasma are Studied by simultaneous measurements of hydrogen, analyte and Ar lines. The local cooling by analyte atomization as well as the recovering of the plasma excitation temperature after completed atomization is measured quantitatively in dependence on time applying the Boltzmann plot method to Simultaneously recorded line intensities of atomized analyte atoms which act as plasma probes. Furthermore, it is shown that relatively small differences in analyte mass Cause significant temperature changes during atomization and, as consequence, strong variations of the emission intensity of analyte lines during atomization if measured by end-on observation. (C) 2009 Elsevier B.V. All rights reserved.
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