University of Surrey

Test tubes in the lab Research in the ATI Dance Research

Metallic iron in cornflakes

Lermyte, Ferderik, Zhang, Wen-ying, Brooks, Jake, Huband, Steven, Collingwood, Joanna F., Lees, Martin R., Rayman, Margaret and Sadler, Peter J. (2020) Metallic iron in cornflakes Food and Function.

[img] Text
IronInCornflakesFoodFunct_FeCorn_R1_Clean.docx - Accepted version Manuscript
Restricted to Repository staff only until 14 February 2021.

Download (622kB)
[img] Text
IronInCornflakesSupplementaryInfoFoodFunct_FeCorn_SI.docx - Supplemental Material
Restricted to Repository staff only until 14 February 2021.

Download (553kB)

Abstract

Iron is an essential element, and typically cornflake-style cereals are fortified with iron to a level up to 14 mg iron per 100 g. Even single cornflakes exhibit magnetic behaviour. We extracted iron microparticles from samples of two own-brand supermarket cornflakes using a strong permanent magnet. Synchrotron iron K-edge x-ray absorption near-edge spectroscopic data were consistent with identification as metallic iron, and x-ray diffraction studies provided unequivocal identification of the extracted iron as body-centred cubic (BCC) -iron. Magnetometry measurements were also consistent with ca. 14 mg/100 g BCC iron. These findings emphasise that attention must be paid to the speciation of trace elements, in relation to their bioavailability. To mimic conditions in the stomach, we suspended the iron extract in dilute HCl (pH 1.0-2.0) at 37oC (body temperature) and found by ICP-MS that over a period of 5 hours, up to 13% of the iron dissolved. This implies that despite its metallic form in the cornflakes, the iron is potentially bioavailable for oxidation and absorption into the body.

Item Type: Article
Divisions : Faculty of Health and Medical Sciences > School of Biosciences and Medicine
Authors :
NameEmailORCID
Lermyte, Ferderik
Zhang, Wen-ying
Brooks, Jake
Huband, Steven
Collingwood, Joanna F.
Lees, Martin R.
Rayman, MargaretM.Rayman@surrey.ac.uk
Sadler, Peter J.
Date : 13 February 2020
Funders : EPSRC, University of Warwick Chancellor's Scholarship
Grant Title : EPSRC Grant
Uncontrolled Keywords : Cornflakes, iron, trace metals, x-ray diffraction, XANES, ICP-MS
Depositing User : James Marshall
Date Deposited : 13 Mar 2020 14:10
Last Modified : 13 Mar 2020 14:10
URI: http://epubs.surrey.ac.uk/id/eprint/853925

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year


Information about this web site

© The University of Surrey, Guildford, Surrey, GU2 7XH, United Kingdom.
+44 (0)1483 300800