A new colorimetric method for determining antioxidant levels using 3,5-dibromo-4-nitrosobenzene sulfonate (DBNBS)

Takeki Tomikawa, Taichi Kashiwagi, Takaaki Komatsu, Shigeru Kabayama, Noboru Nakamichi, Kiichiro Teruya, Sanetaka Shirahata

Research output: Contribution to journalArticlepeer-review

Abstract

We describe here a novel assay that determines the total a+ntioxidative activities of known antioxidants and antioxidants in beverages. The method employs the substrate 3,5-dibromo-4-nitrosobenzene sulfonate (DBNBS) that yields the colored product 3,5,3’,5’-tetrabromoazobenzene sulfate sodium salt (azo-TBBS). The amounts of azo-TBBS are measured using HPLC and then used to calculate total antioxidative capacity (TAC) values. We first show that the TAC values measured using the new DBNBS system were significantly higher compared with the control. The assay was validated through further analysis of 56 compounds, including previously characterized antioxidants. The data are consistent with published values. Here we describe in detail the application of the DBNBS method to the measurement of the TAC values of eight beverages, including wines and fruit juices. The DBNBS assay employs a readily applicable protocol that sensitively determines the levels of antioxidants in foodstuffs.

Original languageEnglish
Article number101797
JournalMethodsX
Volume9
DOIs
Publication statusPublished - Jan 2022

All Science Journal Classification (ASJC) codes

  • Clinical Biochemistry
  • Medical Laboratory Technology

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