Triazole-stabilized fluorescence sensor for highly selective detection of copper in tea and animal feed. (1st July 2020)

• Record Type: Journal Article
• Authors: Qiu, Suyan; Wei, Yihua; Tu, Tianhua; Xiang, Jianjun; Zhang, Dawen; Chen, Qinglong; Luo, Linguang; Lin, Zhenyu
• Is Part Of: Food chemistry. Volume 317(2020)
• Publication Date: 2020-07-01
• Subjects: Fluorescence sensor -- Tris-(benzyltriazolylmethyl)amine -- Copper detection -- High reproducibility -- Tea -- Chicken feed; Food -- Analysis -- Periodicals; Food -- Composition -- Periodicals; 664
• DOI: 10.1016/j.foodchem.2020.126434
• Languages: English
• ISSNs: 0308-8146

Abstract

Highlights: Triazole-stabilized fluorescence sensor was used for copper detection with high selectivity. The ratio of fluorescence decrease was enhanced from 2.46 to 118.25 by using TBTA. High sensitivity and stability were caused by the high fluorescence decrease ratio. High accuracy was verified by detecting Cu(II) in tea samples and feed samples. Abstract: A triazole-stabilized fluorescence sensor is developed for copper detection in the study. Tris-(benzyltriazolylmethyl)amine (TBTA) is used to improve the sensitivity and stability for the sensing system. A series of comparative experiments are performed with and without TBTA. In the presence of TBTA, the fluorescence decrease ratio is enhanced from 2.46 to 118.25; the detection limit is reduced from 67 nM to 3.6 nM; the higher selectivity toward copper compared to the other metal ions is verified, including K +, Ca 2+, Cd 2+, Zn 2+, Mg 2+, Mn 2+, Pb 2+, Hg 2+, Fe 3+ and Cr 3+ . Besides, the sensing system is successfully applied for copper determination in complex tea samples and chicken feed samples with the recovery range of 91.67–116.8%. A good consistency between the presented sensor and the flame atom absorbance spectrometry (FAAS) is confirmed by the low relative errors with the range from −2.39% to 7.02%.