Evaluation on chemical neutron activation analysis for trace metals in seawater using magnesium oxide as the preconcentration agent

J. Lo; K. Lin; J. Wei; J. Lee

doi:10.1007/bf02034507

Journal of Radioanalytical and Nuclear Chemistry

Volume/Issue:: Volume 216: Issue 1

Evaluation on chemical neutron activation analysis for trace metals in seawater using magnesium oxide as the preconcentration agent

Authors:

J. Lo

J. Lo National Tsing Hua University Institute of Nuclear Science 30043 Hsinchu Taiwan, R.O.C.

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K. Lin

K. Lin National Tsing Hua University Institute of Nuclear Science 30043 Hsinchu Taiwan, R.O.C.

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J. Wei

J. Wei National Tsing Hua University Institute of Nuclear Science 30043 Hsinchu Taiwan, R.O.C.

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J. Lee

J. Lee National Tsing Hua University Institute of Nuclear Science 30043 Hsinchu Taiwan, R.O.C.

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Pages:: 121–124

Online Publication Date:: 14 Aug 2005

Publication Date:: 01 Feb 1997

Article Category:: Research Article

DOI:: https://doi.org/10.1007/bf02034507

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Abstract

Attempts have been made to employ magnesium oxide as the preconcentration agent for determination of trace metal sin seawater by neutron activation analysis. Hydrous magnesium oxide can efficienthy adsorb most cationic transition metals and rare earths in a simple water system. The adsorption behavior is believed to depend mainly from the association of the cationic species of the metals with MgO ₂^2– adsorbent. In seawater matrix some of the metal ions such as Hg²⁺, Ni²⁺, etc. may become inefficiently adsorbed owing to the formation of highly stable metal-chloro complexes with chloride ion. Usually the adsorption efficiencies of the metals can be recovered to be as high as the case in the simple water system if an acidified seawater (to pH1) is subjected to the adsorption experiment. In practice, a large volume of seawater (5 1) is stirred with a small amount of hydrous MgO (1 g). Thereafter, the trace metals adsorbed MgO is separated and taken to be neutron activated. The abundant sodium ion and ubiquitous bromide ion can be obviated by the adsorption process, thereby beneficial to the -spectrometry of the metals enriched on MgO.

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Journal of Radioanalytical and Nuclear Chemistry

Print ISSN:: 0236-5731

Online ISSN:: 1588-2780

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Journal of Radionalytical and Nuclear Chemistry
Language	English
Size	A4
Year of Foundation	1968
Volumes per Year	1
Issues per Year	12
Founder	Akadémiai Kiadó
Founder's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher	Akadémiai Kiadó Springer Nature Switzerland AG
Publisher's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245. CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible Publisher	Chief Executive Officer, Akadémiai Kiadó
ISSN	0236-5731 (Print)
ISSN	1588-2780 (Online)