Fransisca Yunnita, Small Darryl M, Morrison Paul D, Spencer Michelle J S, Ball Andrew S, Jones Oliver A H
School of Applied Sciences, RMIT University, GPO Box 2476, Melbourne, VIC 3001, Australia.
School of Applied Sciences, RMIT University, Bundoora, 3073 VIC, Australia.
Chemosphere. 2015 Nov;138:1008-13. doi: 10.1016/j.chemosphere.2014.12.048. Epub 2015 Jan 7.
Chronic dietary exposure to arsenic, particularly the inorganic forms (defined as elemental arsenic, predominantly As(3+) and As(5+), and all its inorganic compounds except arsine), is a matter of concern for human health. Ingestion of arsenic usually occurs via contaminated water but recent studies show there is also a risk of exposure from food, particularly Asian rice (Oryza sativa). Australia is a rice growing country, contributing around 2% of the world rice trade, and a large proportion of the population consumes rice regularly. In the present study we investigated concentrations of arsenic in both Australian grown and imported rice on sale in Australia and examined the potential links with irrigation practises and soil geochemistry. The results indicated a wide spread of arsenic levels of 0.09-0.33 mg kg(-1), with Australian grown Arborio and sushi varieties of O. sativa containing the highest mean value of ∼0.22 mg kg(-1). Arsenic levels in all samples were below the 1 mg kg(-1) limit set by Food Standards Australia New Zealand.
长期通过饮食接触砷，尤其是无机形态的砷（定义为元素砷，主要是As(3+)和As(5+)，以及除砷化氢之外的所有无机化合物），是一个关乎人类健康的问题。砷的摄入通常通过受污染的水发生，但最近的研究表明，食物，尤其是亚洲大米（水稻），也存在接触风险。澳大利亚是一个水稻种植国，占全球大米贸易的约2%，并且很大一部分人口经常食用大米。在本研究中，我们调查了在澳大利亚销售的澳大利亚种植和进口大米中的砷浓度，并研究了其与灌溉方式和土壤地球化学之间的潜在联系。结果表明，砷含量范围广泛，为0.09 - 0.33 mg kg(-1)，澳大利亚种植的阿尔巴利诺和寿司品种水稻的平均含量最高，约为0.22 mg kg(-1)。所有样品中的砷含量均低于澳大利亚新西兰食品标准局设定的1 mg kg(-1)限值。
