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Determination of trace elements in marine plankton by inductively coupled plasma mass spectrometry (ICP-MS)
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Date
2000-02-01
Author
Arslan, Z
Ertas, N
Tyson, JF
Uden, PC
Denoyer, ER
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A method has been developed for the determination of 23 elements in marine plankton in which inductively coupled plasma (ICP) source mass spectrometry (MS) was used to quantify the elements in the solution after digestion in a mixture of hydrofluoric and nitric acids in sealed PTFE vessels in a microwave field. The procedure was validated by the analysis of a standard reference soil (SRM 2709 San Joaquin Soil) and a standard reference fresh water plankton (CRM 414). The method was applied to the analysis of several marine plankton samples grown under controlled conditions including several whose growth media had been enriched with selenium. Matrix induced signal suppressions and instrumental drift were corrected by internal standardization. The suitabilities of germanium, indium, rhodium, scandium and yttrium as internal standard elements were evaluated. Neither scandium nor yttrium could be used due to the presence of these el elements in the samples, germanium was used for the determination of As, Co, Cu, Fe, Ni, Se, Si and Zn, indium was used for Al, Ba, Ca, Eu, Sr, and Tl, and rhodium was used for Cd, Cr, Hg, Mg, Pb, Sb, Sn, and V. For Al, Ca, Cr, Cu, Fe, Mg, Mn, Ni, Si, Sr, V, and Zn internal standardization did not completely compensate for the suppressive effect of the heavier elements and the solutions were diluted. However, for As, Ba, Cd, Co, Eu, HE, Pb, Sb, Se, Sn and T1, it was possible to obtain accurate results despite the 35-40% suppression in the signals. Isobaric overlap was only a problem in the cases of Ca-42 and Se-78; Ca-44 and Se-77, respectively, were used. Memory effects were only observed with Hg for which a nitric acid-sodium chloride solution was the most effective wash-out solution. The marine plankton samples were able to tolerate a higher concentration of Hg as the selenium concentration increased.
Subject Keywords
Biochemistry
URI
https://hdl.handle.net/11511/68044
Journal
FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY
DOI
https://doi.org/10.1007/s002160050053
Collections
Department of Chemistry, Article
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BibTeX
Z. Arslan, N. Ertas, J. Tyson, P. Uden, and E. Denoyer, “Determination of trace elements in marine plankton by inductively coupled plasma mass spectrometry (ICP-MS),”
FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY
, vol. 366, no. 3, pp. 273–282, 2000, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/68044.