Design of an innovative framework based hybrid catalyst for simultaneous and sensitive monitoring of food additive and preservative of vanillin and nitrite in direct samples.

Authors

Ponnusamy Arul, Chinnathambi Nandhini, Sheng-Tung Huang, Chi-Hsien Huang, Krishnamoorthy Shanmugaraj

Published in

Food chemistry. Volume 525. Issue Pt 1. Pages 150399. Jul 12, 2026. Epub Jul 12, 2026.

Abstract

As vanillin (VAN) and nitrite (NIT) contamination in the food chain poses substantial threats to environmental and public health, rapid and portable detection is essential. The present study presents the first electrochemical sensor report based on a hybrid composite of Ni-TPA-MOF and MoS₂/Co₃O₄. The oxidation of VAN and NIT exhibited sharp peaks and less over-potential on Ni-TPA-MOF/MoS₂/Co₃O₄/GCE than on control electrode surfaces. On modified composite electrode surfaces, pH and scan rate were investigated for VAN and NIT. Further, the oxidation current exhibited high linearity at VAN and NIT concentrations of 5 nM-1000 μM and 3 nM-1250 μM, with detection limits of 0.102 nM and 0.073 nM (S/N = 3). We also applied anti-interfering ability (five/ten-fold excess of co-interfering compounds) and practical tests to various food-based real samples, with high recoveries of 98.85-102.41%. This study highlights the catalytic properties of Ni-TPA-MOF/MoS₂/Co₃O₄ and demonstrates the sensor as a promising tool for food safety.

PMID:
42462298
Bibliographic data and abstract were imported from PubMed on 17 Jul 2026.

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