Antioxidant profiling and quality assessment of Lithocarpus polystachyus sweet tea using LC-ECD and LC-MS/MS.

ABSTRACT: This study used liquid chromatography-electrochemical detection (LC-ECD) combined with liquid chromatography-tandem mass spectrometry (LC-MS/MS) to screen and characterize the antioxidant components of sweet tea (Lithocarpus polystachyus), and to evaluate the quality of the samples from different origins. First, the total phenolic and flavonoid content of sweet tea, as well as the in vitro antioxidant activity, including ABTS and DPPH radical scavenging capacities and ferric reducing ability, were determined. Samples from different origins demonstrated potent antioxidant activity, with correlation coefficients exceeding 0.8 between total phenolic content and antioxidant activities. Then, the fingerprints of sweet tea were generated by LC-ECD and 22 common peaks were identified by LC-MS/MS,

SUBMITTER: Zheng J 

PROVIDER: S-EPMC12003848 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature