Urinary excretion of arsenic following rice consumption

A.a. Meharg, P.n. Williams, C.m. Deacon, G.j. Norton, M. Hossain, D. Louhing, E. Marwa, Y. Lawgalwi, M. Taggart, C. Cascio, P. Haris

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21 Citations (Scopus)

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.
Original languageEnglish
Pages (from-to)181-187
JournalEnvironmental Pollution
Volume194
DOIs
Publication statusPublished - 1 Nov 2014

Keywords

  • Arsenic
  • Urine
  • Speciation
  • Rice

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