Bioaccessibility of iron in pearl millet flour contaminated with different soil types

Muleya, Molly; Young, Scott D.; Broadley, Martin R.; Joy, Edward J.M.; Chopera, Prosper; Bailey, Elizabeth H.

Abstract

A controlled in-vitro experiment was conducted to determine the bioaccessibility of extrinsic soil iron in pearl millet contaminated with typical Malawian soils. Pearl millet was contaminated with soils at ratios typically encountered in real life. Iron concentrations of soil-contaminated flour increased such that soil-derived iron contributed 56, 83 and 91% of the total iron when the proportions of soil were 0.1, 0.5 and 1% (soil: grain w/w), respectively. When soils were digested alone, the concentration of bioaccessible iron differed depending on the type of soil. However, the concentration of bioaccessible iron in soil-contaminated flours did not exceed that of uncontaminated flour and there was no effect of soil type. This suggests that knowledge of the proportion of extrinsic soil iron in soil-contaminated grains would be useful for iron bioavailability estimations. Vanadium is a reliable indicator of the presence of extrinsic soil iron in grains and has potential applications in this regard.

Citation

Muleya, M., Young, S. D., Broadley, M. R., Joy, E. J., Chopera, P., & Bailey, E. H. (2023). Bioaccessibility of iron in pearl millet flour contaminated with different soil types. Food Chemistry, 402, Article 134277. https://doi.org/10.1016/j.foodchem.2022.134277

• Journal Article Type: Article
• Acceptance Date: Sep 12, 2022
• Online Publication Date: Sep 15, 2022
• Publication Date: Feb 15, 2023
• Deposit Date: Jun 29, 2023
• Publicly Available Date: Jun 30, 2023
• Journal: Food Chemistry
• Print ISSN: 0308-8146
• Electronic ISSN: 1873-7072
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 402
• Article Number: 134277
• DOI: https://doi.org/10.1016/j.foodchem.2022.134277
• Keywords: Alfisol; Contaminant iron; Intrinsic iron; Oxisol; Pearl millet; Vanadium; Vertisol
• Public URL: https://nottingham-repository.worktribe.com/output/11756269
• Publisher URL: https://www.sciencedirect.com/science/article/pii/S0308814622022397?via%3Dihub
• Additional Information: This article is maintained by: Elsevier; Article Title: Bioaccessibility of iron in pearl millet flour contaminated with different soil types; Journal Title: Food Chemistry; CrossRef DOI link to publisher maintained version: https://doi.org/10.1016/j.foodchem.2022.134277; Content Type: article; Copyright: © 2022 The Authors. Published by Elsevier Ltd.