Non-chromatographic inorganic arsenic speciation in rice by spectrophotometry using silver nanoparticles as platform sensor

IF 9.8 1区农林科学 Q1 CHEMISTRY, APPLIED

Food Chemistry Pub Date : 2025-02-10 DOI:10.1016/j.foodchem.2025.143321

Francisco Eduardo Holanda Lima , Francisco Luan Fonsêca da Silva , Abdullah Abkar Akhdhar , Pierre Basílio Almeida Fechine , Ana Rita de Araujo Nogueira , Wladiana Oliveira Matos

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Abstract

Significant arsenic (As) contents have been reported in rice. The most toxic As species, inorganic arsenic (iAs), is one of the most common species in rice. Thus, it is important monitor iAs in this matrix. In this work, plasmonic silver nanoparticles were functionalized with polyethylene glycol (Ag@PEG) and used as a sensor platform for iAs quantification in rice by spectrophotometry. The proposed method showed good linearity in a range between 1 and 15 μg kg⁻¹; high selectivity for iAs; LOD and LOQ of 0.66 and 1.99 μg kg⁻¹, respectively. The trueness of the method was evaluated by SRM NIST 1568b analysis (105 % of iAs recovery) and by comparing the results with HPLC-ICP-MS analysis (107 %). The As and iAs content in the rice samples varied between 119 and 605 μg kg⁻¹ and 15.7–110 μg kg⁻¹, respectively. The proposed method is simpler, faster, lower-cost and greener compared to conventional analytical methods to quantify iAs.

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用纳米银作为平台传感器分光光度法测定水稻中无机砷的非色谱形态

据报道，水稻中砷的含量很高。最具毒性的砷是水稻中最常见的无机砷（iAs）。因此，这个矩阵中的监视iAs非常重要。在这项工作中，等离子体纳米银被聚乙二醇功能化（Ag@PEG），并被用作分光光度法定量水稻中iAs的传感器平台。该方法在1 ~ 15 μg kg−1范围内线性良好；对iAs的高选择性；定量限和定量限分别为0.66和1.99 μg kg−1。采用SRM NIST 1568b分析（回收率为105 %），并与HPLC-ICP-MS分析（回收率为107 %）进行比较，验证了方法的正确性。水稻样品中As和iAs含量分别为119 ~ 605 μg kg−1和15.7 ~ 110 μg kg−1。与传统的量化iAs的分析方法相比，所提出的方法更简单、更快、成本更低、更环保。

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来源期刊

Food Chemistry 工程技术-食品科技

CiteScore

16.30

自引率

10.20%

发文量

3130

审稿时长

122 days

期刊介绍： Food Chemistry publishes original research papers dealing with the advancement of the chemistry and biochemistry of foods or the analytical methods/ approach used. All papers should focus on the novelty of the research carried out.