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A practical approach to non-spectral interferences elimination in inductively coupled plasma optical emission spectrometry
Authors: Krejčová Anna | Černohorský Tomáš | Bendakovská Lenka
Year: 2016
Type of publication: článek v odborném periodiku
Name of source: Chemical Papers
Publisher name: Springer
Place: Heidelberg
Page from-to: 669-684
Titles:
Language Name Abstract Keywords
cze Praktická příspěvek k eliminaci nespektrálních interferencí v ICP OES Matrix efekty a praktické možnosti snížení nespektrálních interferencí v ICP-OES byly studovány pro mikrokoncentrický Micromist, koncentrickýh a V-groove zmlžovače (VGN), spolu se dvěma cyklonovými mlžnými komorami různých velikostí. Byl sledován projev interferentů a jejich směsí v širokém rozsahu koncentrací až do 2% hmotnostních (Na, Ca, Ba, La, močovina), nebo až do 20 obj. % (kyselina dusičná) na základě analýzy Cd, Cu, K, Mg, Mn, Pb a Zn.
eng A practical approach to non-spectral interferences elimination in inductively coupled plasma optical emission spectrometry Matrix effects and practical possibilities of reducing accompanying non-spectral interferences in inductively coupled plasma optical emission spectrometry (ICP-OES) were studied for microconcentric Micromist, concentric and V-groove nebulizers (VGN) coupled with two cyclonic spray chambers of different sizes. The effect of a wide scale of interferents and mixtures thereof in the concentration range of up to 2 mass % (Na, Ca, Ba, La, urea) or up to 20 vol. % (nitric acid) on the analysis of Cd, Cu, K, Mg, Mn, Pb and Zn was investigated in terms of their analytical recovery and Mg(II) 280.27 nm/Mg(I) 285.29 nm line intensity ratio. Recoveries of ionic lines were lower than those of atomic lines (37-102 %) depending on the matrix concentration. The Mg(II)/Mg(I) ratios were found to be 12-15 and they slightly decreased as the matrix load increased. Exceptional behavior of pure La matrix, steeply lowering the recoveries and Mg(II)/Mg(I) ratios was observed. A Micromist nebulizer coupled with a small inner volume spray chamber provided the highest recoveries (94-102 %), lowest matrix effects across the matrix loads and, compared to others, the least significant dependence without worsening of the analytical characteristics (recoveries, signal background ratios and the Mg(II)/Mg(I) ratios) across the studied matrices. (C) 2016 Institute of Chemistry, Slovak Academy of Sciences ICP-OES; matrix effect; microconcentric Micromist nebulizer; spray chamber

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