Selective and simultaneous electrochemical detection of nitrite and nitrate ions using Ag-MOF: Food and water analyses

IF 9.8 1区农林科学 Q1 CHEMISTRY, APPLIED Food Chemistry Pub Date : 2025-08-30 Epub Date: 2025-04-22 DOI:10.1016/j.foodchem.2025.144457

Chelladurai Arul, Ganesan Veerapandi, Chinnathambi Sekar

{"title":"Selective and simultaneous electrochemical detection of nitrite and nitrate ions using Ag-MOF: Food and water analyses","authors":"Chelladurai Arul, Ganesan Veerapandi, Chinnathambi Sekar","doi":"10.1016/j.foodchem.2025.144457","DOIUrl":null,"url":null,"abstract":"<div><div>We report the synthesis of metal organic framework (MOF) based on Ag and phenylenediamine (C6H4(NH2)2) and its application for detection of both nitrites and nitrates. Ag-MOF modified glassy carbon electrode (GCE) revealed a significantly higher electrocatalytic activity towards selective oxidation of NO2− and reduction of NO3− over wider concentration ranges of 4–4040 μmol/L and 20–4750 μmol/L respectively and the corresponding lowest detection limits have been deduced as 0.045 μmol/L and 12 μmol/L. Interestingly, cyclic voltammetric measurements at Ag-MOF/GCE in phosphate buffer saline (pH 5.0) exhibited both anodic (NO2−) and cathodic (NO3−) peaks indicating the possibility for simultaneous detection of the two nitrogen compounds. Further, the fabricated electrode has been successfully used to determine NO2− and NO3− concentrations in beetroot, spinach, canned chicken and pond water with excellent relative standard deviation (RSD) values and recovery percentages. The results suggest the potential application of the fabricated sensor for food and environmental analyses.</div></div>","PeriodicalId":318,"journal":{"name":"Food Chemistry","volume":"484 ","pages":"Article 144457"},"PeriodicalIF":9.8000,"publicationDate":"2025-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Food Chemistry","FirstCategoryId":"97","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S030881462501708X","RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/4/22 0:00:00","PubModel":"Epub","JCR":"Q1","JCRName":"CHEMISTRY, APPLIED","Score":null,"Total":0}

引用次数: 0

Abstract

We report the synthesis of metal organic framework (MOF) based on Ag and phenylenediamine (C₆H₄(NH₂)₂) and its application for detection of both nitrites and nitrates. Ag-MOF modified glassy carbon electrode (GCE) revealed a significantly higher electrocatalytic activity towards selective oxidation of NO₂⁻ and reduction of NO₃⁻ over wider concentration ranges of 4–4040 μmol/L and 20–4750 μmol/L respectively and the corresponding lowest detection limits have been deduced as 0.045 μmol/L and 12 μmol/L. Interestingly, cyclic voltammetric measurements at Ag-MOF/GCE in phosphate buffer saline (pH 5.0) exhibited both anodic (NO₂⁻) and cathodic (NO₃⁻) peaks indicating the possibility for simultaneous detection of the two nitrogen compounds. Further, the fabricated electrode has been successfully used to determine NO₂⁻ and NO₃⁻ concentrations in beetroot, spinach, canned chicken and pond water with excellent relative standard deviation (RSD) values and recovery percentages. The results suggest the potential application of the fabricated sensor for food and environmental analyses.

Abstract Image

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

利用ag-MOF对食品和水中亚硝酸盐和硝酸盐离子进行选择性和同步电化学检测

我们报告了基于 Ag 和苯二胺 (C6H4(NH2)2) 的金属有机框架 (MOF) 的合成及其在亚硝酸盐和硝酸盐检测中的应用。Ag-MOF 修饰的玻璃碳电极（GCE）在更宽的浓度范围（分别为 4-4040 μmol/L 和 20-4750 μmol/L）内对 NO2-的选择性氧化和 NO3-的还原具有更高的电催化活性，相应的最低检测限分别为 0.045 μmol/L 和 12 μmol/L。有趣的是，在磷酸盐缓冲盐水（pH 值为 5.0）中对 Ag-MOF/GCE 进行的循环伏安测量显示出阳极（NO2-）和阴极（NO3-）峰，这表明可以同时检测这两种含氮化合物。此外，制作的电极已成功用于测定甜菜根、菠菜、罐头鸡肉和池塘水中的 NO2-和 NO3-浓度，并取得了极佳的相对标准偏差 (RSD) 值和回收率。这些结果表明，制作的传感器具有应用于食品和环境分析的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文去求助

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.