Allan D. C. Chilimba
Elemental composition of Malawian rice
Chilimba, Allan D. C.; Joy, Edward J. M.; Joy, Edward J.M.; Louise Ander, E.; Broadley, Martin R.; Young, Scott D.; Chilimba, Allan D.C.; Hamilton, Elliott M.; Watts, Michael J.
Authors
Edward J. M. Joy
Edward J.M. Joy
LOUISE ANDER Louise.Ander1@nottingham.ac.uk
Principal Research Fellow
MARTIN BROADLEY MARTIN.BROADLEY@NOTTINGHAM.AC.UK
Professor of Plant Nutrition
Scott D. Young
Allan D.C. Chilimba
Elliott M. Hamilton
Michael J. Watts
Abstract
Widespread potential dietary deficiencies of calcium (Ca), iron (Fe), iodine (I), selenium (Se) and zinc (Zn) have been identified in Malawi. Several deficiencies are likely to be compounded by high phytic acid (PA) consumption. Rice (Oryzasativa) is commonly consumed in some Malawian populations, and its mineral micronutrient content is important for food security. The considerable irrigation requirements and flooded conditions of paddy soils can also introduce or mobilise potentially toxic elements including arsenic (As), cadmium (Cd) and lead (Pb). The aim of this study was to determine the mineral composition of rice sampled from farmers’ fields and markets in Malawi. Rice was sampled from 18 extension planning areas across Malawi with 21 white (i.e. polished) and 33 brown samples collected. Elemental composition was determined by inductively coupled plasma-mass spectrometry (ICP-MS). Arsenic speciation was performed using high-performance liquid chromatography (HPLC)-ICP-MS. Concentration of PA was determined using a PA-total phosphorus assay. Median total concentrations (mg kg−1, dry weight) of elements important for human nutrition in brown and white rice, respectively, were: Ca = 66.5 and 37.8; Cu = 3.65 and 2.49; Fe = 22.1 and 7.2; I = 0.006 and
Citation
Chilimba, A. D. C., Joy, E. J. M., Joy, E. J., Louise Ander, E., Broadley, M. R., Young, S. D., …Watts, M. J. (2017). Elemental composition of Malawian rice. Environmental Geochemistry and Health, 39(4), 835-845. https://doi.org/10.1007/s10653-016-9854-9
Journal Article Type | Article |
---|---|
Acceptance Date | Jul 12, 2016 |
Online Publication Date | Jul 20, 2016 |
Publication Date | 2017-08 |
Deposit Date | Jul 3, 2017 |
Publicly Available Date | Jul 3, 2017 |
Journal | Environmental Geochemistry and Health |
Print ISSN | 0269-4042 |
Electronic ISSN | 1573-2983 |
Publisher | Springer Verlag |
Peer Reviewed | Peer Reviewed |
Volume | 39 |
Issue | 4 |
Pages | 835-845 |
DOI | https://doi.org/10.1007/s10653-016-9854-9 |
Keywords | Arsenic; Micronutrient deficiencies; Phytic acid; Rice; Selenium; Zinc |
Public URL | https://nottingham-repository.worktribe.com/output/967348 |
Publisher URL | https://link.springer.com/article/10.1007%2Fs10653-016-9854-9 |
Additional Information | This is a post-peer-review, pre-copyedit version of an article published in Environmental Geochemistry and Health. The final authenticated version is available online at: http://dx.doi.org/10.1007/s10653-016-9854-9 |
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