Journal
ANALYTICAL SCIENCES
Volume 35, Issue 6, Pages 639-644Publisher
JAPAN SOC ANALYTICAL CHEMISTRY
DOI: 10.2116/analsci.18P572
Keywords
ECL sensor; Ru(bpy)(3)(2+) immobilization; brilliant blue FCF; intensity quenching
Categories
Funding
- Natural Science Foundation of the Jiangsu Higher Education Institutions of China [18KJB150001]
- National Natural Science Foundation of China [51574047]
- Foundation of Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology [BM2012110]
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A novel electrochemiluminescence (ECL) sensor for detection of brilliant blue FCF (BB) has been developed using Ru@Zn-MOF/nafion modified GCE (glass carbon electrode) in this research. Different from conventional method for usage of Ru(bpy)(3)(2+) in solution-phase, Ru(bpy)(3)(2+) here was immobilized on a zinc-metal-organic-framework (Zn-MOF). After adding BB, a significant quenching phenomenon of ECL intensity was observed. The behavior of BB on the quenching effect of Ru(bpy)(3)(2+)/Zn-MOF in different conditions was investigated thoroughly and the detection limit was achieved to 2.5 x 10(-8) M in an optimized condition. Furthermore, the interference of some conventional ions and amino acids to the detection of BB was also investigated. Additionally, the composite showed a good effect on the detection of BB in commercial samples. The proposed sensor provided a promising platform for food safety analysis, environmental monitoring and clinical testing.
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