Inorganic arsenic contamination in rice is a global public concern due to the risks associated. In spite of being an important issue, few studies concerning differences between inorganic arsenic in rice grains under organic and conventional methods of cultivation are available in Brazil, which is an important producer and consumer. In the present work, samples of polished and husked rice (organic and conventional) and gastronomic rice (Arborio, Carnaroli and red/black rice) were analyzed and the results compared to FAO/Codex maximum limits. The total determination and speciation analysis of arsenic were carried out by ICP-MS and HPLC-ICP-MS, respectively. The results showed no significant statistical differences in total As concentration in organic rice (157.7±56.1ngg-1) vs. conventional rice (137.4±46.6ngg-1) and also in organic husked rice (227.7±95.5ngg-1) vs. conventional husked (217.7±60.9ngg-1). However, inorganic As was 45% higher in organic polished rice than in conventional polished rice and 41% higher in organic husked rice than in conventional husked rice. Gastronomic rice presented total arsenic ranging from 65.4 to 348ngg-1 for black and Arborio rice, respectively. Regarding the maximum levels adopted by Codex for i-As (200ngg-1), no violation was found.

中文翻译：

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有机和传统种植的巴西大米中的砷形态：砷含量是否有差异？

由于相关风险，大米中的无机砷污染已引起全球公众的关注。尽管是一个重要的问题，但巴西还是一个重要的生产国和消费国，有关有机和常规栽培方法下稻米中无机砷之间差异的研究很少。在目前的工作中，分析了精米和脱皮米（有机和常规米）和美食米（Arborio，Carnaroli和红/黑米）的样品，并将结果与​​FAO / Codex的最大限量进行了比较。砷的总含量测定和形态分析分别通过ICP-MS和HPLC-ICP-MS进行。结果显示，有机大米（157.7±56.1ngg-1）与传统大米（137.4±46.6ngg-1）和有机糙米（227）的总砷浓度无显着统计学差异。7±95.5ngg-1）与常规的脱壳（217.7±60.9ngg-1）。但是，有机精米中的无机砷比常规精米高45％，有机糙米中无机砷比常规糙米中高41％。美食稻对黑米和Arborio米的总砷含量分别为65.4至348ngg-1。关于食典对i-As（200ngg-1）所采用的最大含量，未发现任何违规情况。