Journal
MICROCHEMICAL JOURNAL
Volume 183, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.microc.2022.107954
Keywords
Propyl gallate; ?-aminobutyric acid; Gold nanoclusters; Sensor
Categories
Funding
- Natural Science Foundation of Shandong Province, China [ZR2017MB062, ZR2014BL020]
- Project of Shandong Province Higher Educational Science and Technology Program [J17KB62]
- Fujian Provincial Key Laboratory of Modern Analytical Science and Separation Technology, Minnan Normal University [2020KFKT-02]
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A highly sensitive sensor for determination of propyl gallate (PG) in foodstuffs was developed and demonstrated excellent specificity and good recoveries. The sensor has potential applications in food safety control.
Propyl gallate (PG), a common anti-oxidant used in food, has garnered extensive attention due to its possible harm to human health. Herein, a highly sensitive sensor for determination of PG in foodstuffs was fabricated by electropolymerizing gamma-aminobutyric acid (GABA) and electrodepositing gold (Au) on a glassy carbon electrode (GCE). Scanning electron microscopic (SEM) images showed that the poly GABA formed a layer of uniform membrane, and the deposited Au was needle-like nanoclusters (AuNC). The electrochemical experiments showed that, under the optimal conditions, the modified electrode can be used for determination of PG in a wide con-centration range from 0.06 to 3.6 mu mol/L, with a correlation coefficient (R) of 0.9990 and a detection limit of 0.001 mu mol/L (S/N = 3). The applicability of the sensor was verified by detecting PG in food samples, such as instant noodles, biscuits and edible oils, with excellent specificity and good recoveries (94.0-100.6 %), indicating that the sensor has application prospects in food safety control.
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