Queensland Alliance for Environmental Health Sciences (QAEHS), The University of Queensland, 20 Cornwall Street, Woolloongabba, QLD, 4102, Australia.
Department of Environmental Biology, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy.
Food Chem. 2024 Dec 15;461:140831. doi: 10.1016/j.foodchem.2024.140831. Epub 2024 Aug 10.
Eight sample digestion procedures were compared to determine 41 elements in rice samples by ICP-MS and CV-AFS. Analytical methods were evaluated using certified rice flour reference material (NIST 1568b) and recovery experiments. The microwave-assisted digestion of 0.5 g rice sample and reagent mixture of 2 mL HNO, 0.5 mL HO, and 0.5 mL deionized water yielded the best recovery for all elements ranging from 90 to 120% at three different levels, bias% within 10%, and precision (coefficient of variation percent, CV% intra- and inter-day) below 15%. The best analytical method was applied to the elemental determination in nine types of rice available on the Italian market. Daily or weekly rice consumption meets the nutritional and safety requirements of EFSA and WHO. The present study allows extensive and detailed knowledge of the content of essential and non-essential/toxic elements in different types of rice produced or packaged in Italy.
八种样品消解程序被比较，以通过 ICP-MS 和 CV-AFS 测定大米样品中的 41 种元素。通过使用认证的大米粉参考物质（NIST 1568b）和回收实验来评估分析方法。对于所有元素，微波辅助消解 0.5g 大米样品和 2ml HNO、0.5ml HO 和 0.5ml 去离子水的试剂混合物在三个不同水平下产生最佳回收率，范围在 90-120%之间，偏差%在 10%以内，日内和日间精密度（变异系数%，CV%）低于 15%。最佳分析方法应用于在意大利市场上可获得的九种大米中的元素测定。每日或每周的大米摄入量符合 EFSA 和世卫组织的营养和安全要求。本研究允许对在意大利生产或包装的不同类型的大米中的必需和非必需/有毒元素的含量进行广泛和详细的了解。
