title: Urinary excretion of arsenic following rice consumption.
abstract: Patterns of arsenic excretion were followed in a cohort (n = 6) eating a defined rice diet, 300 g per day d.wt. where arsenic speciation was characterized in cooked rice, following a period of abstinence from rice, and other high arsenic containing foods. A control group who did not consume rice were also monitored. The rice consumed in the study contained inorganic arsenic and dimethylarsinic acid (DMA) at a ratio of 1:1, yet the urine speciation was dominated by DMA (90%). At steady state (rice consumption/urinary excretion) ∼40% of rice derived arsenic was excreted via urine. By monitoring of each urine pass throughout the day it was observed that there was considerable variation (up to 13-fold) for an individual's total arsenic urine content, and that there was a time dependent variation in urinary total arsenic content. This calls into question the robustness of routinely used first pass/spot check urine sampling for arsenic analysis.
authors.affiliation: Institute for Global Food Security, Queens University Belfast, David Keir Building, Malone Road, Belfast, BT9 5BN, Northern Ireland, UK. Electronic address: aa.meharg@qub.ac.uk.
authors.forename: A A
authors.initials: AA
authors.lastname: Meharg
authors.affiliation: Institute for Global Food Security, Queens University Belfast, David Keir Building, Malone Road, Belfast, BT9 5BN, Northern Ireland, UK. Electronic address: p.williams@qub.ac.uk.
authors.forename: P N
authors.initials: PN
authors.lastname: Williams
authors.affiliation: Institute of Biological and Environmental Sciences, University of Aberdeen, Cruickshank Building, St Machar Drive, Aberdeen, AB24 3UU, Scotland, UK.
authors.forename: C M
authors.initials: CM
authors.lastname: Deacon
authors.affiliation: Institute of Biological and Environmental Sciences, University of Aberdeen, Cruickshank Building, St Machar Drive, Aberdeen, AB24 3UU, Scotland, UK.
authors.forename: G J
authors.initials: GJ
authors.lastname: Norton
authors.affiliation: Institute of Biological and Environmental Sciences, University of Aberdeen, Cruickshank Building, St Machar Drive, Aberdeen, AB24 3UU, Scotland, UK; Department of Soil Science, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh.
authors.forename: M
authors.initials: M
authors.lastname: Hossain
authors.affiliation: Institute of Biological and Environmental Sciences, University of Aberdeen, Cruickshank Building, St Machar Drive, Aberdeen, AB24 3UU, Scotland, UK; Department of Chemical Engineering, University of Bath, Bath, BA2 7AY, UK.
authors.forename: D
authors.initials: D
authors.lastname: Louhing
authors.affiliation: Institute of Biological and Environmental Sciences, University of Aberdeen, Cruickshank Building, St Machar Drive, Aberdeen, AB24 3UU, Scotland, UK; Department of Soil Science, Soikoine University of Agriculture, P. O. Box 3008, Morogoro, Tanzania.
authors.forename: E
authors.initials: E
authors.lastname: Marwa
authors.affiliation: Institute of Biological and Environmental Sciences, University of Aberdeen, Cruickshank Building, St Machar Drive, Aberdeen, AB24 3UU, Scotland, UK; Department of Plant Production, University of Sirte, Libya.
authors.forename: Y
authors.initials: Y
authors.lastname: Lawgalwi
authors.affiliation: Institute of Biological and Environmental Sciences, University of Aberdeen, Cruickshank Building, St Machar Drive, Aberdeen, AB24 3UU, Scotland, UK; University of the Highlands and Islands, 12b Ness Walk, Inverness, Scotland, IV3 5SQ, UK.
authors.forename: M
authors.initials: M
authors.lastname: Taggart
authors.affiliation: Institute of Biological and Environmental Sciences, University of Aberdeen, Cruickshank Building, St Machar Drive, Aberdeen, AB24 3UU, Scotland, UK; European Commission, Ispra, Italy.
authors.forename: C
authors.initials: C
authors.lastname: Cascio
authors.affiliation: Faculty of Health and Life Sciences, De Montfort Univ., The Gateway, Leicester LE1 9BH, UK.
authors.forename: P
authors.initials: P
authors.lastname: Haris
mesh_terms: D001151:Arsenic / Q000032:analysis / Q000652:urine*; D002101:Cacodylic Acid / Q000652:urine; D004032:Diet / Q000706:statistics & numerical data*; D004785:Environmental Pollutants / Q000032:analysis / Q000652:urine*; D005502:Food; D005506:Food Contamination / Q000032:analysis*; D006801:Humans; D008297:Male; D012275:Oryza / Q000737:chemistry*
chemical_list: D004785:Environmental Pollutants; D002101:Cacodylic Acid; D001151:Arsenic
keywords: Arsenic; Rice; Speciation; Urine