Arsenic speciation in rice consumed in south-western Nigeria, and estimation of dietary intake of arsenic species through rice consumption
JA Adeyemi, CO Adedire… - Toxicological & …, 2017 - Taylor & Francis
Toxicological & Environmental Chemistry, 2017•Taylor & Francis
This study determined concentrations and speciation of arsenic (As) in rice samples
obtained from the cities of Akure, Ore, Ondo and Ikare in Ondo State, south-western Nigeria.
The estimated dietary intake of As from rice consumption for total As and the identified As
species were compared with the As benchmark dose lower confidence limit. Analyses of rice
from the four cities identified three As species: inorganic As, monomethylarsonic, acid and
dimethylarsinic acid. Concentrations of total As and the As species differed significantly …
obtained from the cities of Akure, Ore, Ondo and Ikare in Ondo State, south-western Nigeria.
The estimated dietary intake of As from rice consumption for total As and the identified As
species were compared with the As benchmark dose lower confidence limit. Analyses of rice
from the four cities identified three As species: inorganic As, monomethylarsonic, acid and
dimethylarsinic acid. Concentrations of total As and the As species differed significantly …
Abstract
This study determined concentrations and speciation of arsenic (As) in rice samples obtained from the cities of Akure, Ore, Ondo and Ikare in Ondo State, south-western Nigeria. The estimated dietary intake of As from rice consumption for total As and the identified As species were compared with the As benchmark dose lower confidence limit. Analyses of rice from the four cities identified three As species: inorganic As, monomethylarsonic, acid and dimethylarsinic acid. Concentrations of total As and the As species differed significantly across the sampling locations (by a factor of 2.5 for total As). Mean levels (±S.D.) were 58.8 ± 0.7 µg/kg total As, 47.0 ± 0.6 µg/kg inorganic As, 0.33 ± 0.03 µg/kg monomethylarsonic acid, and 11.5 ± 0.1 µg/kg dimethylarsinic acid. The estimated mean dietary intakes were 4.1 µg/d total As, 3.3 µg/d inorganic As, 0.02 µg/d monomethylarsonic acid, and 0.8 µg/d dimethylarsinic acid. These values are below the benchmark dose lower confidence limit and comparable to, or lower than, those reported for other countries. Thus, consumption of rice cultivated in south-western Nigeria does not appear to have inherent As-associated health risks.
![](/scholar/images/qa_favicons/tandfonline.com.png)
以上显示的是最相近的搜索结果。 查看全部搜索结果