A Comparison of ETV and LA for the Determination of Trace Elements in Solid Samples by MIP OES

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Abstract

The performance of electrothermal vaporization (ETV) and laser ablation (LA) of dry aerosols as sample introduction systems for microwave induced plasma optical emission spectrometry (MIP OES) are compared and evaluated in terms of detection limits, precision and accuracy for the determination of trace elements (Ca, Cd, Cu, Fe, Mg, Mn, Sr, Zn) in the same solid micro samples. In MIP OES both radiation sources can be independently adjusted to optimize the sampling process and then its subsequent excitation. A univariate approach and simplex optimization procedure were used to obtain the best signal/noise (S/N) ratio and derive analytical figures of merit. A comparison using a Student’s t-test between the results obtained by both ETV/LA-MIP OES methods for trace elements, and concentrations in standard reference material (SRM) and certified reference materials (CRMs) showed that there was no significant differences on a 95 % confidence level. The detection limits of the tested elements in solid samples by ETV/LA-MIP OES were in the range of 0.1 to 11 µg g−1 for all elements determined, while the corresponding absolute values in the range of ng. The precision of the results for ETV-MIP OES and LA-MIP OES varied between 2 and 4 % and 3 and 7 %, respectively. The linear dynamic ranges in the ETV/LA-MIP OES are extend over three decades of concentration. The methods were validated by the analysis of NIST SRM 2711Montana Soil, NRCC CRM PACS-2 Marine Sediment and NRCC CRM TORT-2 Lobster Hepatopancreas of different matrix composition and by the standard addition technique.

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  • [1] Tendero C Tixier C Tristant P Desmaison J Leprince P. Atmospheric pressure plasmas: A review. Spectrochim Acta B. 2006;61:2-30. DOI: 10.1016/j.sab.2005.10.003.

  • [2] Mester Z Sturgeon R editors. Sample Preparation for Trace Element Analysis. Amsterdam: Elsevier; 2003. ISBN 9781849730525.

  • [3] Jankowski KJ Reszke E. Microwave Induced Plasma Analytical Spectrometry. Cambridge. UK: Royal Society of Chemistry; 2011. ISBN 9780444511010.

  • [4] Matusiewicz H. Thermal vaporization for sample introduction in microwave induced plasma analytical emission spectrometry. Spectrochim Acta Rev. 1990;13:47-68.

  • [5] Resano M Vanhaecke F de Loos-Vollebregt MTC. Electrothermal vaporization for sample introduction in atomic absorption atomic emission and plasma mass spectrometry - a critical review with focus on solid sampling and slurry analysis. J Anal At Spectrom. 2008;23:1450-1475. DOI: 10.1039/b807756h.

  • [6] Matusiewicz H Kopras M. Simultaneous determination of hydride forming elements (As Bi Ge Sb Se) and Hg in biological and environmental reference materials by electrothermal vaporization-microwave induced plasma-optical emission spectrometry with their in situ trapping in a graphite furnace. J Anal At Spectrom. 2003;18:1415-1425. DOI: 10.1039/B309359J.

  • [7] http://spectral-systems.de.

  • [8] Leis F Laqua K. Emissionsspectralanalyse mit Anregung des durch Laserstrahlung erzeugten Dampfes fester Proben in einer Mikrowellenentladung-I. Grundlagen der Methode und experimenttelle Verwirklichung (Emission spectral analysis with excitation of the vapor generated by laser radiation of solid samples in a microwave discharge-I. Fundamentals of the method and experimental realization). Spectrochim Acta B. 1979;33:727-740.

  • [9] Leis F Laqua K. Emissionsspectralanalyse mit Anregung des durch Laserstrahlung erzeugten Dampfes fester Proben in einer Mikrowellenentladung-II. Analytische Anwendungen (Emission spectral analysis with excitation of the vapor generated by laser radiation of solid samples in a microwave discharge II. Analytical applications). Spectrochim Acta B. 1979;34:307-316.

  • [10] http://appliedspectra.com.

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