T/CI 134-2022 Antioxidant performance photoelectrochemical determination method and detection instrument

Scope

Scope: This document specifies the method and detection instruments for measuring antioxidant performance using photoelectrochemistry. This document is applicable to the detection and analysis of the antioxidant performance of water-soluble and oil-soluble systems based on the ug-C3N4/TiO2 (ultra-thin nitrogenated carbon/titanium dioxide) photoelectrochemical platform. It can be used to detect the antioxidant performance of systems containing natural and synthetic antioxidants, such as natural fruits and vegetables, fruit juices, red wine, tea, edible oils, and products in the fields of traditional Chinese medicine, health supplements, and cosmetics. For the detection of antioxidant performance on photoelectrochemical platforms based on other photoelectrode materials, please refer to the corresponding instructions. Main Technical Content: 3.1 Antioxidant: A class of molecules or ions that can protect organisms from damage caused by oxidative active substances at low concentrations. 3.2 Antioxidant Capacity: Also known as reduction capacity, it refers to the ability of antioxidants to eliminate oxidative active substances or their ability to react with oxidative active substances. 3.3 Antioxidant Capacity: Refers to the total antioxidant capacity of a system containing multiple antioxidants. Note: Considering that there are often interactions (such as synergistic effects, additive effects, antagonistic effects, etc.) among multiple antioxidants, the total antioxidant capacity of a system containing multiple antioxidants is not simply the sum of the antioxidant capacities of individual antioxidants. Therefore, it is described as antioxidant capacity, distinguishing it from the antioxidant capacity of individual antioxidants. 3.4 Equivalent Value of Antioxidant Standard: When determining the antioxidant capacity of actual samples, it is necessary to first conduct a concentration gradient detection of the antioxidant standard to obtain a linear fitting equ

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