Determination of Iodine in Seafood by Inductively Coupled Plasma/Mass Spectrometry
Abstract A method was developed for determination of total iodine content in different standard reference materials (SRMs) and seafood products by inductively coupled plasma/mass spectrometry (ICP/MS). If iodine is present as iodide and nitric acid is used in the wet digestion system, the observed s...
Published in: | Journal of AOAC INTERNATIONAL |
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Oxford University Press (OUP)
2001
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Online Access: | http://dx.doi.org/10.1093/jaoac/84.6.1976 http://academic.oup.com/jaoac/article-pdf/84/6/1976/32415512/jaoac1976.pdf |
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croxfordunivpr:10.1093/jaoac/84.6.1976 2024-06-23T07:51:37+00:00 Determination of Iodine in Seafood by Inductively Coupled Plasma/Mass Spectrometry Julshamn, Kaare Dahl, Lisbeth Eckhoff, Karen 2001 http://dx.doi.org/10.1093/jaoac/84.6.1976 http://academic.oup.com/jaoac/article-pdf/84/6/1976/32415512/jaoac1976.pdf en eng Oxford University Press (OUP) https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model Journal of AOAC INTERNATIONAL volume 84, issue 6, page 1976-1983 ISSN 1060-3271 1944-7922 journal-article 2001 croxfordunivpr https://doi.org/10.1093/jaoac/84.6.1976 2024-06-11T04:21:44Z Abstract A method was developed for determination of total iodine content in different standard reference materials (SRMs) and seafood products by inductively coupled plasma/mass spectrometry (ICP/MS). If iodine is present as iodide and nitric acid is used in the wet digestion system, the observed signal is not stable when iodine is measured by ICP/MS at m/z 127. To stabilize the iodine signal, 3% ammonia solution (1 + 1, v/v) was added to the digest. The limit of quantitation of the method, defined as 6 times the standard deviation in the blank solution (n = 20) was estimated to be 15 mg/kg (using 0.2 g dry mass and a dilution factor of 50). The precision, expressed as repeatability of the iodine concentration, varied between 3.2 and 12% in SRMs, with concentrations of 4.70–0.17 mg/kg dry matter. The described method was compared with a method using tetramethylammonium hydroxide extraction. Both methods showed good precision and trueness by analyses of SRMs. The 2 methods were used to determine iodine in seafood from the Barents Sea, the Norwegian Sea, and the North Sea. The results showed great variation between different fish species as well as between individuals within a species. The lowest values of iodine were recorded in muscle of ling (Molva molva) with a mean of 0.07 mg/kg fresh weight and a variation between 0.03 and 0.11 mg/kg fresh weight. The highest values were found in cod (Gadus morhua) from the Barents Sea, with a mean of 2.5 mg/kg and a variation between 0.7 and 12.7 mg/kg fresh weight. Article in Journal/Newspaper Barents Sea Gadus morhua Norwegian Sea Oxford University Press Barents Sea Norwegian Sea Journal of AOAC INTERNATIONAL 84 6 1976 1983 |
institution |
Open Polar |
collection |
Oxford University Press |
op_collection_id |
croxfordunivpr |
language |
English |
description |
Abstract A method was developed for determination of total iodine content in different standard reference materials (SRMs) and seafood products by inductively coupled plasma/mass spectrometry (ICP/MS). If iodine is present as iodide and nitric acid is used in the wet digestion system, the observed signal is not stable when iodine is measured by ICP/MS at m/z 127. To stabilize the iodine signal, 3% ammonia solution (1 + 1, v/v) was added to the digest. The limit of quantitation of the method, defined as 6 times the standard deviation in the blank solution (n = 20) was estimated to be 15 mg/kg (using 0.2 g dry mass and a dilution factor of 50). The precision, expressed as repeatability of the iodine concentration, varied between 3.2 and 12% in SRMs, with concentrations of 4.70–0.17 mg/kg dry matter. The described method was compared with a method using tetramethylammonium hydroxide extraction. Both methods showed good precision and trueness by analyses of SRMs. The 2 methods were used to determine iodine in seafood from the Barents Sea, the Norwegian Sea, and the North Sea. The results showed great variation between different fish species as well as between individuals within a species. The lowest values of iodine were recorded in muscle of ling (Molva molva) with a mean of 0.07 mg/kg fresh weight and a variation between 0.03 and 0.11 mg/kg fresh weight. The highest values were found in cod (Gadus morhua) from the Barents Sea, with a mean of 2.5 mg/kg and a variation between 0.7 and 12.7 mg/kg fresh weight. |
format |
Article in Journal/Newspaper |
author |
Julshamn, Kaare Dahl, Lisbeth Eckhoff, Karen |
spellingShingle |
Julshamn, Kaare Dahl, Lisbeth Eckhoff, Karen Determination of Iodine in Seafood by Inductively Coupled Plasma/Mass Spectrometry |
author_facet |
Julshamn, Kaare Dahl, Lisbeth Eckhoff, Karen |
author_sort |
Julshamn, Kaare |
title |
Determination of Iodine in Seafood by Inductively Coupled Plasma/Mass Spectrometry |
title_short |
Determination of Iodine in Seafood by Inductively Coupled Plasma/Mass Spectrometry |
title_full |
Determination of Iodine in Seafood by Inductively Coupled Plasma/Mass Spectrometry |
title_fullStr |
Determination of Iodine in Seafood by Inductively Coupled Plasma/Mass Spectrometry |
title_full_unstemmed |
Determination of Iodine in Seafood by Inductively Coupled Plasma/Mass Spectrometry |
title_sort |
determination of iodine in seafood by inductively coupled plasma/mass spectrometry |
publisher |
Oxford University Press (OUP) |
publishDate |
2001 |
url |
http://dx.doi.org/10.1093/jaoac/84.6.1976 http://academic.oup.com/jaoac/article-pdf/84/6/1976/32415512/jaoac1976.pdf |
geographic |
Barents Sea Norwegian Sea |
geographic_facet |
Barents Sea Norwegian Sea |
genre |
Barents Sea Gadus morhua Norwegian Sea |
genre_facet |
Barents Sea Gadus morhua Norwegian Sea |
op_source |
Journal of AOAC INTERNATIONAL volume 84, issue 6, page 1976-1983 ISSN 1060-3271 1944-7922 |
op_rights |
https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model |
op_doi |
https://doi.org/10.1093/jaoac/84.6.1976 |
container_title |
Journal of AOAC INTERNATIONAL |
container_volume |
84 |
container_issue |
6 |
container_start_page |
1976 |
op_container_end_page |
1983 |
_version_ |
1802642747221344256 |