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Electrochemiluminescence Sensor Based on CeO2 Nanocrystalline for Hg2+ Detection in Environmental Samples.
Tian, Chunyuan; Tang, Feiyan; Guo, Wei; Wei, Minggang; Wang, Li; Zhuang, Xuming; Luan, Feng.
Affiliation
  • Tian C; College of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China.
  • Tang F; College of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China.
  • Guo W; Shandong Dyne Marine Biopharmaceutical Co., Ltd., Weihai 264300, China.
  • Wei M; College of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China.
  • Wang L; College of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China.
  • Zhuang X; College of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China.
  • Luan F; College of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China.
Molecules ; 29(1)2023 Dec 19.
Article in En | MEDLINE | ID: mdl-38202584
ABSTRACT
The excessive concentration of heavy-metal mercury ions (Hg2+) in the environment seriously affects the ecological environment and even threatens human health. Therefore, it is necessary to develop rapid and low-cost determination methods to achieve trace detection of Hg2+. In this paper, an Electrochemiluminescence (ECL) sensing platform using a functionalized rare-earth material (cerium oxide, CeO2) as the luminescent unit and an aptamer as a capture unit was designed and constructed. Using the specific asymmetric matching between Hg2+ and thymine (T) base pairs in the deoxyribonucleic acid (DNA) single strand, the "T-Hg-T" structure was formed to change the ECL signal, leading to a direct and sensitive response to Hg2+. The results show a good linear relationship between the concentration and the response signal within the range of 10 pM-100 µM for Hg2+, with a detection limit as low as 0.35 pM. In addition, the ECL probe exhibits a stable ECL performance and excellent specificity for identifying target Hg2+. It was then successfully used for spiked recovery tests of actual samples in the environment. The analytical method solves the problem of poor Hg2+ recognition specificity, provides a new idea for the efficient and low-cost detection of heavy-metal pollutant Hg2+ in the environment, and broadens the prospects for the development and application of rare-earth materials.
Key words

Full text: 1 Collection: 01-internacional Database: MEDLINE Type of study: Diagnostic_studies Language: En Journal: Molecules / Molecules (Basel) Journal subject: BIOLOGIA Year: 2023 Type: Article Affiliation country: China

Full text: 1 Collection: 01-internacional Database: MEDLINE Type of study: Diagnostic_studies Language: En Journal: Molecules / Molecules (Basel) Journal subject: BIOLOGIA Year: 2023 Type: Article Affiliation country: China