Bioavailability study using an in-vitro method of iodine and bromine in edible seaweed

Romarís–Hortas, Vanessa; García-Sartal, Cristina; Barciela‐Alonso, María Carmen; Domínguez-González, Raquel; Moreda-Piñeiro, Antonio; Bermejo-Barrera, Pilar

doi:10.1016/j.foodchem.2010.07.117

Cited by 85 publications

(77 citation statements)

References 9 publications

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“…Accordingly, the characteristic strontium compositions seen in some Scottish island communities have been linked to the use of kelp as food, fodder and fertilizer 32 . Seaweed, such as kelp, has high strontium content [33][34][35][36] and thus abundant strontium with a seawater signature is released into the terrestrial biosphere and food chain when it is used to fertilize soils and as a food source 35,36 .…”

Section: Strontium Concentration Range and Isotope Composition Found mentioning

confidence: 99%

A summary of strontium and oxygen isotope variation in archaeological human tooth enamel excavated from Britain

Evans¹,

Chenery²,

Montgomery

2012

J. Anal. At. Spectrom.

143

169

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This paper presents a compilation of strontium and oxygen isotope data from human tooth enamel that has been produced at NERC Isotope Geosciences Laboratory over the last c.15years. These many and often small studies are here combined to provide an overview of data from Britain. The strontium isotope composition ranges between 0.7078 and 0.7165 (excluding individuals deemed to be of non-British origin). The median Sr concentration is 84 ppm but there is a vector of increasing Sr concentrations related to seawater strontium isotope composition that is seen in individuals predominantly from the west coast of Scotland attributed to the used of kelp as a fertilizer. The oxygen isotope data is normally distributed with a mean value of 17.7‰ ± 1.4‰ (2SD n=615). Two sub-populations of local individuals have been identified that provide control groups for human enamel values from the eastern side of Britain where there are lower rainfall levels: 17.2‰ ± 1.26‰, (2SD, n=83) and western area of Britain where rainfall levels are higher = 18.2‰ ± 0.98‰, (2SD, n=41).These data make it possible to make direct comparisons of population means between burial populations and the control dataset to assess commonality of origin.

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Section: Strontium Concentration Range and Isotope Composition Found mentioning

confidence: 99%

A summary of strontium and oxygen isotope variation in archaeological human tooth enamel excavated from Britain

Evans¹,

Chenery²,

Montgomery

2012

J. Anal. At. Spectrom.

143

169

View full text Add to dashboard Cite

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“…Thus, the deficiency or excess of this element may result in human health disorders [3]. On the other hand, bromine does not have a well-established physiological function and its mechanism of action is still unknown [4]. However, some studies have associated the excess or deficiency of this element with disorders in humans [1].…”

Section: Introductionmentioning

confidence: 99%

Feasibility of ultra-trace determination of bromine and iodine in honey by ICP-MS using high sample mass in microwave-induced combustion

et al. 2015

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This work demonstrates the feasibility of ultra-trace determination of halogens in biological samples by inductively coupled plasma mass spectrometry (ICP-MS) after decomposition by microwave-induced combustion (MIC). The conventional MIC method was improved to allow the combustion of samples with mass higher than that used in previous works in order to achieve better limits of detection (LODs). The applicability of the proposed method for ultra-trace determination of bromine and iodine in organic samples was demonstrated here using honey. It was possible to decompose up to 1000 mg of honey using microcrystalline cellulose as a combustion aid and polyethylene film for sample wrapping. After combustion, analytes were absorbed using 50 mmol L(-1) NH4OH and recoveries for Br and I were between 99 and 104 %, and relative standard deviations were lower than 5 %. Microwave-assisted alkaline dissolution (MA-AD) was also evaluated for honey sample preparation using NH4OH or tetramethylammonium hydroxide solutions. However, the LODs for the MA-AD method were unsuitable because the high carbon content in digests required a dilution step prior to the analysis by ICP-MS. The LODs obtained by MIC were improved from 1143 to 34 ng g(-1) for Br and from 571 to 6.0 ng g(-1) for I, when compared to the MA-AD method. Furthermore, it was possible to decompose up to eight samples simultaneously in 30 min (including the cooling step) with very low reagent consumption and consequently lower generation of effluents, making MIC method well suited for routine ultra-trace determination of Br and I in honey. Graphical Abstract A high mass of honey was efficiently digested by MIC for subsequent Br and I determination by ICP-MS.

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“…The best method to resolve or at least to control the problem is mass balance test [22]. Nevertheless, determination of iodine traces in extracts and residue of digested biological sample is necessary.…”

Section: Introductionmentioning

confidence: 99%

“…Inductively coupled plasma mass spectrometry (ICP MS) offers the most advantages with selectivity and low limits of detection as primary features. It is used to determine total amounts of iodine [23] as well as to access bioavailability of iodine from foods [22,24]. However, it has to be emphasized that analysis of iodine species by ICP MS is vulnerable to memory effects, instability of the signal and other problems due to possible adsorption of iodine species on plastic surfaces (Teflon Ò , Ryton Ò ) or its volatilization inside the mist chamber.…”

Section: Introductionmentioning

confidence: 99%

Investigation of iodine bioavailability from chicken eggs versus iodized kitchen salt with in vitro method

Lipiec

Warowicka

Ruzik

et al. 2012

Eur Food Res Technol

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The goal of the presented studies was to investigate speciation and bioavailability of iodine from chicken eggs versus iodized kitchen salt with an in vitro method. Determination of iodine total content in chicken eggs and iodized kitchen salt was carried out by inductively coupled plasma mass spectrometry (ICP MS). The majority of iodine was accumulated in the yolk-the concentration was even 37 times higher than in white. Chicken eggs were treated with buffer (Tris HCl pH = 7.5) and enzymatic extraction media and analyzed by size exclusion chromatography hyphenated with inductively coupled plasma mass spectrometry (SEC ICP MS). The enzymatic extraction being an in vitro bioavailability assessment method was based on two-stage digestion model simulating gastric (pepsin digestion) and intestinal (pancreatin digestion) juices. Speciation analyses along with bioavailability studies presented iodide as the major form in chicken eggs. The bioavailability was established as 33% from white and 10% from yolk and decreased with longer time of boiling. It allows to suggest that the majority of iodine remains in forms bound to non-digestible coagulated and waterinsoluble proteins.

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Bioavailability study using an in-vitro method of iodine and bromine in edible seaweed

Cited by 85 publications

References 9 publications

A summary of strontium and oxygen isotope variation in archaeological human tooth enamel excavated from Britain

A summary of strontium and oxygen isotope variation in archaeological human tooth enamel excavated from Britain

Feasibility of ultra-trace determination of bromine and iodine in honey by ICP-MS using high sample mass in microwave-induced combustion

Investigation of iodine bioavailability from chicken eggs versus iodized kitchen salt with in vitro method

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