Determination of Antioxidant Activity of Hibiscus Flowers by Flow Injection Analysis with Chemiluminescence Detection

被引：7

作者：

Murillo Pulgarin, Jose A. ^{[1
]}

Garcia Bermejo, Luisa F. ^{[1
]}

Carrasquero Duran, Armando ^{[2
]}

机构：

[1] Univ Castilla La Mancha, Dept Analyt Chem & Foods Technol, E-13071 Ciudad Real, Spain

[2] Univ Pedag Expt Libertador, Dept Chem, Maracay, Venezuela

来源：

ANALYTICAL LETTERS | 2017年 / 50卷 / 01期

关键词：

Antioxidant activity; chemiluminescence; flow injection analysis; Hibiscus; polyphenolic compounds; IN-VIVO; WINES; INFUSIONS; QUANTIFICATION; CAPACITY; ACID; TEA;

D O I：

10.1080/00032719.2016.1167216

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

This study reports a simple and rapid method for the determination of the antioxidant activity of the phenolics present in plants of the Hibiscus genus. The protocol is based on the ability of the phenolic compounds to inhibit luminol chemiluminescence through the inactivation of free radicals in a flow injection system. Using the optimized operational conditions, the antioxidant activities of several phenolics were measured. The results were explained on the basis of structure-reactivity relationships. The antioxidant activities of dried flowers of Hibiscus rosa-sinensis and Hibiscus sabdariffa were evaluated. The protocol was validated by the 2,2-diphenyl-1-picrylhydrazyl-hydrate free radical assay. The differences in the antiradical activities were explained based on the concentrations of total polyphenol and flavonoid concentrations determined by spectrophotometric methods. It was concluded that the chemiluminescence method was complementary for the evaluation of hydrophilic antioxidants in plants.

引用

页码：186 / 196

页数：11

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