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Food Chem. 2016 Jul 1;202:356-63. doi: 10.1016/j.foodchem.2016.01.117. Epub 2016 Feb 4.

Geographical variation in inorganic arsenic in paddy field samples and commercial rice from the Iberian Peninsula.

Author information

1
Institute for Global Food Security, Queen's University Belfast, David Keir Building, Malone Road, Belfast BT9 5BN, Northern Ireland, United Kingdom. Electronic address: a.signes-pastor@qub.ac.uk.
2
Institute for Global Food Security, Queen's University Belfast, David Keir Building, Malone Road, Belfast BT9 5BN, Northern Ireland, United Kingdom.
3
AgroFood Technology Department, Miguel Hernández University, Carretera de Beniel, km 3.2, 03312 Orihuela, Alicante, Spain.
4
Department of Agricultural Chemistry, Universidad Autónoma de Madrid, 28049 Madrid, Spain.
5
Doñana Biological Station, EBD-CSIC, Amarico Vespucio Rd. 41092, Seville, Spain.

Abstract

This study investigated total arsenic and arsenic speciation in rice using ion chromatography with mass spectrometric detection (IC-ICP-MS), covering the main rice-growing regions of the Iberian Peninsula in Europe. The main arsenic species found were inorganic and dimethylarsinic acid. Samples surveyed were soil, shoots and field-collected rice grain. From this information soil to plant arsenic transfer was investigated plus the distribution of arsenic in rice across the geographical regions of Spain and Portugal. Commercial polished rice was also obtained from each region and tested for arsenic speciation, showing a positive correlation with field-obtained rice grain. Commercial polished rice had the lowest i-As content in Andalucia, Murcia and Valencia while Extremadura had the highest concentrations. About 26% of commercial rice samples exceeded the permissible concentration for infant food production as governed by the European Commission. Some cadmium data is also presented, available with ICP-MS analyses, and show low concentration in rice samples.

KEYWORDS:

Arsenic speciation; Cadmium; Iberian Peninsula; Inorganic arsenic; Rice; Shoots; Soil

PMID:
26920305
DOI:
10.1016/j.foodchem.2016.01.117
[Indexed for MEDLINE]

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