Triazole-stabilized fluorescence sensor for highly selective detection of copper in tea and animal feed.

Author(s) Qiu, S.; Wei, Y.; Tu, T.; Xiang, J.; Zhang, D.; Chen, Q.; Luo, L.; Lin, Z.
Journal Food Chem
Date Published 2020 Jul 01

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, Cd, Zn, Mg, Mn, Pb, Hg, Fe and Cr. 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%.

DOI 10.1016/j.foodchem.2020.126434
Keywords Animal Feed; Copper; Fluorescence; Fluorescent Dyes; Food Analysis; Limit of Detection; Metals; Organometallic Compounds; Sensitivity and Specificity; Spectrometry, Fluorescence; Tea; Triazoles
ISSN 1873-7072
Citation Food Chem. 2020;317:126434.