Iodine in different food articles and standard reference materials

Dermelj, M.; Šlejkovec, Zdenka; Byrne, A. R.; Stegnar, P.; Stibilj, Vekoslava; Roßbach, M.

doi:10.1007/bf00322538

Cited by 44 publications

(32 citation statements)

References 18 publications

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“…These separations and determinations have been published in more detail elsewhere (Byrne and Kosta, 1974;Dermelj et al, 1990Dermelj et al, , 1991Stibilj et al, 1994). Briefly, the bases of the radiochemical separations are as follows:…”

Section: Radiochemical Separations Of Induced Radioisotopesmentioning

confidence: 99%

“…Accordingly, various radiochemical approaches have been developed in our laboratory for the elements Se and I (Byrne and Kosta, 1974;Dermelj et al, 1990Dermelj et al, , 1991Stibilj et al, 1994).…”

Section: Determination Of Selenium and Iodine By Rnaamentioning

confidence: 99%

“…Determination of Se (Dermelj et al, 1990(Dermelj et al, , 1991. A radiochemical Neutron Activation Analyses (NAA) procedure for separate determination of selenium is based on destruction of the irradiated sample (300-800 mg) with added carrier using 6 g Mg(NO 3 ) 2 , on reduction of Se(IV) with 6 M HCl, and on extraction of the chelate 5-nitro-2,1,3-benzoselendiazole with toluene after the reaction between Se(IV) and 4-nitro-1,2-diaminobenzene.…”

Section: Radiochemical Separations Of Induced Radioisotopesmentioning

confidence: 99%

See 2 more Smart Citations

Elemental Composition (Ca, Mg, Mn, Cu, Cr, Zn, Se, and I) of Daily Diet Samples from Some Old People's Homes in Slovenia

Pokorn

Stibilj

Gregorič

et al. 1998

Journal of Food Composition and Analysis

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Section: Radiochemical Separations Of Induced Radioisotopesmentioning

confidence: 99%

Section: Determination Of Selenium and Iodine By Rnaamentioning

confidence: 99%

Section: Radiochemical Separations Of Induced Radioisotopesmentioning

confidence: 99%

See 1 more Smart Citation

Elemental Composition (Ca, Mg, Mn, Cu, Cr, Zn, Se, and I) of Daily Diet Samples from Some Old People's Homes in Slovenia

Pokorn

Stibilj

Gregorič

et al. 1998

Journal of Food Composition and Analysis

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“…In order to stabilize the signal and minimize memory effect, samples as well as standard solutions used for calibration contained 0.25% TMAH (tetramethyl ammonium hydroxide) (Muramatsu and Wedepohl, 1998;Tagami and Uchida, 2005) RNAA was performed by the Josez Stefan Institute in Slovenia (Dermelj et al, 1990;Osterc and Stibilj, 2005;Osterc et al, 2007). 180 mg of rock powder was pelletized with 120 mg of cellulose powder.…”

Section: Total Iodine* Concentration Determinationmentioning

confidence: 99%

Natural iodine in a clay formation: Implications for iodine fate in geological disposals

Claret

Lerouge

Laurioux

et al. 2010

Geochimica et Cosmochimica Acta

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Iodine is one of the most problematic radioisotopes in the context of nuclear waste geological disposal due to its high mobility. Considerable effort has been dedicated to the measurement of its potential retardation during diffusive transport leading to conflicting results, from no retardation to significant retardation, leading in turn to considerable debate. The present study aims at providing new insights into this aspect of the iodine problem by careful quantification of iodine reservoirs in the Callovian-Oxfordian (COx) clay rock taken here as model material for these studies. The present study confirmed the ubiquitous presence of iodine at 1-5 mg kg -1 level in the COx clayey formation. The iodide concentration level in the porewater is also confirmed at a value in the range ~20-40 µmol L -1 , i.e. higher than the expected range of radio-iodine concentration in the far-field of the storage. Surprisingly, most of the iodine was found not to be associated with organic matter but rather in an inorganic form associated with carbonate minerals. This result has potentially significant implications for the fate of radio-iodine. In undisturbed far-field conditions, most natural iodine would not be accessible for isotopic exchange with radioactive iodine, reducing the effective Kd to negligible values. During laboratory experiments, good monitoring of the geochemical parameters (at least the Eh, pH, P CO2 , [Ca] and [Mg]) is mandatory to avoid iodine-bearing carbonate precipitation and to enable rigorous interpretation of the iodide diffusion/retention experiments.2

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“…Iodine has been determined in human brain samples by burning the activated samples in oxygen atmosphere and separating 128 I using oxidation-reduction and extraction cycles [20,21,22,23]. Another objective of this work was to extend the method for the determination of iodine concentration not only in whole brain samples (high fat content) but -by applying two types of solvent extraction -in lipid fraction and in brain tissue without lipid.…”

Section: Introductionmentioning

confidence: 99%

Iodine concentration in different human brain parts

Andrási¹,

Bélavári²,

Stibilj³

et al. 2004

Analytical and Bioanalytical Chemistry

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Iodine is one of the most important essential elements as demonstrated by the fact that its deficiency can cause goitre. Nevertheless, quantitative data on its concentration in biological materials, especially in the human brain, are scarce. There is therefore a demand for accurate and reliable information on iodine in these types of samples. The purpose of the present work was to determine the concentration of total iodine in some control human brain parts by rapid radiochemical neutron activation analysis. Our second goal was to determine I distribution between lipid fraction and in brain tissue without lipid by applying two types of solvent extraction methods. The results were checked by the analysis of biological standard reference materials with certified or literature values for iodine and good agreement was found.

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Iodine in different food articles and standard reference materials

Cited by 44 publications

References 18 publications

Elemental Composition (Ca, Mg, Mn, Cu, Cr, Zn, Se, and I) of Daily Diet Samples from Some Old People's Homes in Slovenia

Elemental Composition (Ca, Mg, Mn, Cu, Cr, Zn, Se, and I) of Daily Diet Samples from Some Old People's Homes in Slovenia

Natural iodine in a clay formation: Implications for iodine fate in geological disposals

Iodine concentration in different human brain parts

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