{"title":"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","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 (C<sub>6</sub>H<sub>4</sub>(NH<sub>2</sub>)<sub>2</sub>) 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 NO<sub>2</sub><sup>−</sup> and reduction of NO<sub>3</sub><sup>−</sup> 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 (NO<sub>2</sub><sup>−</sup>) and cathodic (NO<sub>3</sub><sup>−</sup>) peaks indicating the possibility for simultaneous detection of the two nitrogen compounds. Further, the fabricated electrode has been successfully used to determine NO<sub>2</sub><sup>−</sup> and NO<sub>3</sub><sup>−</sup> 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":"{\"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 (C<sub>6</sub>H<sub>4</sub>(NH<sub>2</sub>)<sub>2</sub>) 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 NO<sub>2</sub><sup>−</sup> and reduction of NO<sub>3</sub><sup>−</sup> 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 (NO<sub>2</sub><sup>−</sup>) and cathodic (NO<sub>3</sub><sup>−</sup>) peaks indicating the possibility for simultaneous detection of the two nitrogen compounds. Further, the fabricated electrode has been successfully used to determine NO<sub>2</sub><sup>−</sup> and NO<sub>3</sub><sup>−</sup> 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}","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}
Selective and simultaneous electrochemical detection of nitrite and nitrate ions using Ag-MOF: Food and water analyses
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.
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.
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
