期刊
FOOD CONTROL
卷 136, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodcont.2022.108844
关键词
Electrochemical sensor; Food preservative; Tert-butyl hydroquinone; Cobalt oxide; Functionalized carbon black; Voltammetry
资金
- Ministry of Science and Technology (MOST), Taiwan, ROC [109-2221-E-027-110]
In this paper, a highly sensitive and cost-effective electrochemical sensor for the nanomolar detection of synthetic antioxidant TBHQ is reported. The sensor showed excellent performance in TBHQ detection and achieved adequate recovery values in different samples.
Artificial food preservatives are widely utilized across the globe to prolong shelf life of food. In this paper, a highly sensitive and cost-effective electrochemical sensor for the nanomolar detection of synthetic antioxidant tert-butyl hydroquinone (TBHQ) commonly used as a food preservative is reported. A hybrid nanocomposite was sonochemically prepared by embedding surface functionalized carbon black (FCB) on spinel Co3O4 nanorods. We used oxalic acid mediated co-precipitation approach in the synthesis of highly porous Co3O4 nanorods and CB was chemically oxidized using acid-treatment. Significant characterization techniques including XRD, SEM, mapping, Raman spectroscopy, FTIR, and EIS were utilized for analyzing morphological and structural properties of materials. The prepared hybrid nanocomposite modified electrode exhibited excellent electrochemical performance. A high sensitivity of 7.94 mu A mu M-1 cm(-2), ultra-low detection limit of 1 nM, and quantification limit of 5 nM was achieved in TBHQ detection based on the modified electrode. Furthermore, the practicality of the developed electrochemical sensor in TBHQ detection is confirmed by conducting real sample analysis experiment in beef tallow, peanut oil, and lake water resulting in adequate recovery values.
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