%0 Journal Article
%T Arsenic concentrations and speciation in Australian and imported rice and commercial rice products
%A Elliott Duncan
%A Frank Krikowa
%A Hayden Martin
%A Michael J. Ellwood
%A Peter Snell
%A Rajani Jagtap
%A Simon Foster
%A Tariq Ezaz
%A William Maher
%J Environmental Chemistry
%D 2018
%R 10.1071/EN18073
%X Environmental context. In countries where inhabitants are not exposed to arsenic-contaminated drinking water, food is the major source of potentially toxic inorganic arsenic. To complement the existing worldwide dataset on arsenic in rice, data are presented on Australian- and overseas-grown rice, and assessed in terms of possible risk. Only a diet comprising multiple serves of some rice products per day poses a potential risk to young children. Abstract. Arsenic concentrations and speciation measurements were determined for six varieties of Australian-grown rice (n£¿=£¿130), imported rice (n£¿=£¿53) and rice products (n£¿=£¿56) from supermarkets. Total As, inorganic As and dimethylarsinic acid (DMA) concentrations in Australian rice ranged from 16 to 630£¿¦Ìg As kg£¿1 (mean£¿¡À£¿s.d.: 220£¿¡À£¿122£¿¦Ìg£¿kg£¿1), 16 to 250£¿¦Ìg As kg£¿1 (92£¿¡À£¿52£¿¦Ìg As kg£¿1) and <5 to 432£¿¦Ìg As kg£¿1 (125£¿¡À£¿109£¿¦Ìg As kg£¿1), respectively. Total As, inorganic As and DMA concentrations in imported rice ranged between 31 and 376£¿¦Ìg As kg£¿1 (130£¿¡À£¿98£¿¦Ìg£¿kg£¿1), 17 and 198£¿¦Ìg As kg£¿1 (73£¿¡À£¿40£¿¦Ìg As kg£¿1) and <5 and 327£¿¦Ìg As kg£¿1 (84£¿¡À£¿92£¿¦Ìg As kg£¿1) respectively. Few samples exceeded the guidelines for inorganic As in polished rice. In rice products, total As, inorganic As and DMA concentrations ranged between 21 and 480£¿¦Ìg As kg£¿1 (160£¿¡À£¿110£¿¦Ìg As kg£¿1), 20 and 255£¿¦Ìg As kg£¿1 (92£¿¡À£¿78£¿¦Ìg As kg£¿1) and <5 and 340£¿¦Ìg As kg£¿1 (65£¿¡À£¿69£¿¦Ìg As kg£¿1) respectively. Sixteen samples exceeded the 100£¿¦Ìg£¿kg£¿1 maximum for inorganic As concentration in rice foods for infants and young children. Ingestion of multiple serves of some rice products poses a potential risk. Environmental chemistry gaps, on processes influencing As occurrence in rice, are discussed.
%U http://www.publish.csiro.au/EN/fulltext/EN18073