Nanomolar detection of food additive tert-butylhydroquinone in edible oils based on novel ternary metal oxide embedded β-cyclodextrin functionalized carbon black. (30th May 2022)

• Record Type: Journal Article
• Authors: Sebastian, Neethu; Yu, Wan-Chin; Balram, Deepak; Al-Mubaddel, Fahad S.; Tayyab Noman, Muhammad
• Is Part Of: Food chemistry. Volume 377(2022)
• Publication Date: 2022-05-30
• Subjects: Electrochemical sensor -- Food preservative -- TBHQ -- Ternary metal oxide -- Cyclodextrin; Food -- Analysis -- Periodicals; Food -- Composition -- Periodicals; 664
• DOI: 10.1016/j.foodchem.2021.131867
• Languages: English
• ISSNs: 0308-8146

Abstract

Graphical abstract: Highlights: Sensitive and reliable detection of commonly used food additive tert -butylhydroquinone. Prepared ZnCuMg TMO/β-CD-CB hybrid nanocomposite based on sonochemical approach. Nanomolar-level detection limit and high sensitivity was achieved for the proposed TBHQ sensor. Real sample analysis was conducted in edible oil samples to ensure practical feasibility of TBHQ detection. Abstract: It is pivotal to precisely detect food preservatives to ascertain food quality and safety. In this work, we report the sensitive electrochemical detection of widely used cytotoxic food preservative tert -butylhydroquinone (TBHQ). A novel nanocomposite was sonochemically prepared by embedding ternary metal oxide (TMO) comprising ZnO, CuO, and MgO in β-cyclodextrin (β-CD) functionalized carbon black (CB). The properties of the prepared nanocomposite were evaluated by employing multiple characterization methods. The nanocomposite fabricated on a screen printed carbon electrode exhibited exceptional electrocatalytic activity towards TBHQ detection, evident from the resultant very low detection limit of 1 nM and high sensitivity of 22.67 μA μM −1 cm −2 . Moreover, the developed TBHQ sensor evinced all the important traits of a good electrochemical sensor including excellent selectivity, stability, reproducibility, and repeatability. Furthermore, for validating practical feasibility of TBHQ detection, we successfully determined this food additive in edible oils.