title: Antioxidant activity of leaf extracts from different Hibiscus sabdariffa accessions and simultaneous determination five major antioxidant compounds by LC-Q-TOF-MS.
abstract: Hibiscus sabdariffa has gained attention for its antioxidant activity. There are many accessions of H. sabdariffa in the world. However, information on the quantification of antioxidant compounds in different accessions is rather limited. In this paper, a liquid chromatography/quadrupole-time-of-flight mass spectrometry (LC-Q-TOF-MS) method for simultaneous determination of five antioxidant compounds (neochlorogenic acid, chlorogenic acid, cryptochlorogenic acid, rutin, and isoquercitrin) in H. sabdariffa leaves was developed. The method was validated for linearity, sensitivity, precision, repeatability and accuracy. The validated method has been successfully applied for determination of the five analytes in eight accessions of H. sabdariffa. The eight accessions of H. sabdariffa were evaluated for their antioxidant activities by DPPH free radical scavenging assay. The investigated accessions of H. sabdariffa were rich in rutin and exhibited strong antioxidant activity. The two accessions showing the highest antioxidant activities were from Cuba (No. 2) and Taiwan (No. 5). The results indicated that H. sabdariffa leaves could be considered as a potential antioxidant source for the food industry. The developed LC-Q-TOF-MS method is helpful for quality control of H. sabdariffa.
authors.affiliation: SFA Key Laboratory of Bamboo and Rattan Science and Technology, International Centre for Bamboo and Rattan, No. 8 Futong Dongdajie, Wangjing, Chaoyang District, Beijing 100102, China. wangjin@icbr.ac.cn.
authors.forename: Jin
authors.initials: J
authors.lastname: Wang
authors.affiliation: SFA Key Laboratory of Bamboo and Rattan Science and Technology, International Centre for Bamboo and Rattan, No. 8 Futong Dongdajie, Wangjing, Chaoyang District, Beijing 100102, China. caoxianshuang123@163.com.
authors.forename: Xianshuang
authors.initials: X
authors.lastname: Cao
authors.affiliation: SFA Key Laboratory of Bamboo and Rattan Science and Technology, International Centre for Bamboo and Rattan, No. 8 Futong Dongdajie, Wangjing, Chaoyang District, Beijing 100102, China. 15956907446@163.com.
authors.forename: Hao
authors.initials: H
authors.lastname: Jiang
authors.affiliation: Southern University Agricultural Research and Extension Center, Baton Rouge, LA 70813, USA. yadong_qi@suagcenter.com.
authors.forename: Yadong
authors.initials: Y
authors.lastname: Qi
authors.affiliation: Southern University Agricultural Research and Extension Center, Baton Rouge, LA 70813, USA. kit_chin@suagcenter.com.
authors.forename: Kit L
authors.initials: KL
authors.lastname: Chin
authors.affiliation: SFA Key Laboratory of Bamboo and Rattan Science and Technology, International Centre for Bamboo and Rattan, No. 8 Futong Dongdajie, Wangjing, Chaoyang District, Beijing 100102, China. yueyd@icbr.ac.cn.
authors.forename: Yongde
authors.initials: Y
authors.lastname: Yue
mesh_terms: D001713:Biphenyl Compounds / Q000737:chemistry; D002853:Chromatography, Liquid; D016166:Free Radical Scavengers / Q000737:chemistry* / Q000302:isolation & purification; D005609:Free Radicals / Q000737:chemistry; D031584:Hibiscus / Q000737:chemistry*; D057230:Limit of Detection; D013058:Mass Spectrometry; D010851:Picrates / Q000737:chemistry; D010936:Plant Extracts / Q000737:chemistry* / Q000302:isolation & purification; D018515:Plant Leaves / Q000737:chemistry*
chemical_list: D001713:Biphenyl Compounds; D016166:Free Radical Scavengers; D005609:Free Radicals; D010851:Picrates; D010936:Plant Extracts; C004931:1,1-diphenyl-2-picrylhydrazyl