A disposable electrochemical sensor based on Sr-Zr MOFs for ultralow detection of nitrate ions in beverages
Journal of the Iranian Chemical Society, cilt.23, sa.7, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 23 Sayı: 7
- Basım Tarihi: 2026
- Doi Numarası: 10.1007/s13738-026-03521-y
- Dergi Adı: Journal of the Iranian Chemical Society
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Ultimate (EBSCO), Materials Science & Engineering Collection (ProQuest), Technology Collection (ProQuest)
- Anahtar Kelimeler: Beverage products, Nitrate ion, Screen printing carbon electrode, Zr-Sr bimetallic
- Erciyes Üniversitesi Adresli: Evet
Özet
The most widely used food preservative and color stabilizer is nitrate NO3− and mostly used in juices and beverages. Although high intake and long-term exposure to NO3− lead to health risk including generation of N-nitrosamines, a carcinogenic agent. It is necessary to develop modern and eco-friendly analytical strategies for the detection of NO3− in food samples. In present study, a rationally engineered bimetallic strontium-zirconium metal organic framework (Sr-Zr-MOF) was hydrothermally synthesized using terephthalic acid as a ligand and was employed as a modifier for screen-printed carbon electrode (SPCE) for ultrasensitive electrochemical detection of NO3−. The synthesized material was characterized and its structural and morphological feature was confirmed using FTIR, XRD, SEM and EDX analysis. The Strontium-Zirconium metal organic framework screen-printed carbon electrode (Sr-Zr MOF/SPCE) exhibited a remarkable electrocatalytic activity toward the detection of NO3− ion, with the low limit of detection (LOD) = 0.012 µM and limit of quantification (LOQ) = 0.036 µM. The fabricated Zr-Sr MOF/SPCE possesses excellent repeatability sensitivity, selectivity, reproducibility and long-term stability with 2.34% RSD values because of highly porous structure and availability of large number of the active site for the adsorption of the NO3−. The practical applicability of the proposed Zr-Sr MOF/SPCE was validated via detection of NO3− in commercial juices like grapes and beverages like cola and energy drink with the % recover 97.3-103.2%. These findings depict that synthesized Zr-Sr MOF/SPCE provides a simple easy, cost-effective, eco-friendly and highly sensitive platform for determination of the NO3− in complex food metrices.