Abstract Inorganic As (iAs) species require strict monitoring in foodstuff due to their toxicity. Rice is of particular concern, with recent legislations establishing limits for these species. In this work we develop a method based on selective hydride generation atomic absorption spectrometry (HGAAS) for the determination of iAs in different types of rice (polish, parboiled, brown and paddy rice). The multivariate design of experiments used for optimization showed interactions between different factors involved in hydride generation. Matrix effects were systematically studied, where the flow rate of the carrier gas proved to be a critical parameter for the minimization of matrix interferences. Nevertheless, matrix-matching was found to be necessary for accurate quantification of paddy rice samples. Comparison of the iAs concentrations obtained by HGAAS and HPLC-ICP-MS showed non-significant differences between the methods. Analysis of 86 rice samples from the province of Entre Rios showed relatively low concentrations of iAs (

中文翻译：

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选择性 HGAAS 测定阿根廷大米中的无机砷：水稻、糙米和精米的分析性能

摘要 无机砷 (iAs) 物质由于其毒性需要在食品中进行严格监测。水稻尤其受到关注，最近的立法对这些物种进行了限制。在这项工作中，我们开发了一种基于选择性氢化物发生原子吸收光谱 (HGAAS) 的方法，用于测定不同类型大米（精米、蒸谷米、糙米和水稻）中的 iAs。用于优化的多变量实验设计显示了参与氢化物生成的不同因素之间的相互作用。系统研究了基质效应，其中载气的流速被证明是最小化基质干扰的关键参数。然而，发现基质匹配对于水稻样品的准确定量是必要的。通过 HGAAS 和 HPLC-ICP-MS 获得的 iAs 浓度的比较表明两种方法之间没有显着差异。对 Entre Rios 省 86 个大米样品的分析显示 iAs 浓度相对较低（