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Tris(2,2′-bipyridine)ruthenium(II) electrochemiluminescence using rongalite as coreactant and its application in detection of foodstuff adulteration,”
(Journal of Electroanalytical Chemistry, 2020) Zholudov, Yu. T.; Abubakar Abdussalam; Fan Yuan; Fangxin Du; Muhammad Nadeem Zafar; Guobao Xu; Xiangui Ma
The persistent reports on the indiscriminate contamination of foodstuffs with inedible chemicals for economic gains and the high cost of the existing analytical methods for their detection make it necessary to develop simple and cheaper methods for the immediate detection of those toxic substances. Here, we report a fast and highly sensitive electrochemiluminescence (ECL) method for the detection of foodstuffs adulteration with an industrial bleaching agent-rongalite (RGL) for the first time. Under the optimal conditions, the ECL intensity of the tris(2,2′-bipyridine)ruthenium(II) (Ru(bpy)3 2+) increases linearly with the concentration of RGL in the range of 1 μM to 1000 μM with a limit of detection of 0.57 μM (S/N = 3). The developed method has shown excellent selectivity in the presence of co-existing interfering species. The application of the ECL method in this contribution can be extended to other foodstuffs that might be adulterated with RGL other than the one (tofu) investigated here.