Evidence map›Paper›PMID 42487078›Full record

ArticleMikrochimica acta2026

Highly efficient colorimetric sensing for total antioxidant capacity of tea utilizing UiO-66(Ce) with oxidase-like activity.

Shaoying He, Yunxin Wang, Wenhui Hu, Yanran Chen

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Article in Mikrochimica acta, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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5 · Who and what money

Authors and funding

4 authors.

Shaoying HeFaculty of Science, Kunming University of Science and Technology, Kunming, 650500, China. hesy@kust.edu.cn.
Yunxin WangFaculty of Science, Kunming University of Science and Technology, Kunming, 650500, China.
Wenhui HuFaculty of Science, Kunming University of Science and Technology, Kunming, 650500, China.
Yanran ChenFaculty of Science, Kunming University of Science and Technology, Kunming, 650500, China.

Funding

Basic Research Projects in Yunnan Province No. 202401CF070112Kunming University of Science and Technology's Joint Special Project for the Creation of "Double First-Class" No. 202301BE070001-044Talent Introduction Project of Kunming University No. 141120230123
6 · The paper itself

Abstract

The determination of total antioxidant capacity (TAC) plays a crucial role in evaluating the quality of tea. However, existing methods suffer from issues such as lengthy testing times and low sensitivity. To overcome these limitations, UiO-66(Ce) was prepared by hydrothermal synthesis and demonstrated excellent detection performance in the determination of TAC. It achieved the detection of TAC within 6 min, and showed a good linear range in the quantitative determination of three representative reducing substances, including ascorbic acid (AA), tannic acid (TA), and cysteine (Cys). The detection limits were 3.88, 1.99, and 12.59 µM, respectively. Furthermore, the sensing mechanism was systematically investigated. UiO-66(Ce) efficiently generated ·OH through the Ce(III)/Ce(IV) redox system to oxidize 3,3',5,5'-tetramethylbenzidine (TMB). Subsequently, the added antioxidants scavenged ·OH and reduced oxTMB, triggering a distinct color change and enabling rapid TAC detection. Based on the above research, we have verified the feasibility of this detection method in practical applications and successfully achieved rapid TAC determination in tea. This research provides a new method for the rapid and accurate determination of TAC, and it shows broad application potential.

Indexed as

AntioxidantsColorimetryPhthalic AcidsTeaAscorbic AcidBenzidinesCysteineLimit of DetectionMetal-Organic FrameworksOxidation-ReductionOxidoreductasesTannins3,3',5,5'-tetramethylbenzidineAntioxidantsAscorbic AcidBenzidinesCysteineMetal-Organic FrameworksOxidoreductasesPhthalic AcidsTanninsTeaUiO-66Colorimetric methodNanozymesOxidase-like activityTotal antioxidant capacityUiO-66(Ce)

Identifiers

PMID42487078

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