title: High-throughput relative DPPH radical scavenging capacity assay.
abstract: A high-throughput relative 2,2-diphenyl-1-picryhydrazyl (DPPH) radical scavenging capacity (RDSC) assay was developed and validated in the present study. This RDSC assay is easy to perform and has acceptable accuracy (90-110% recovery), precision [3.9-7.0% pooled relative standard deviation (RSD)], and reproducibility (2.2 and 3.5% interday and intraday RSD). This assay reports the RDSC values for antioxidant samples, which make it possible to compare the DPPH radical scavenging capacities of antioxidants determined in different laboratories. The RDSC assay may be conducted in aqueous alcohol and acetone for hydrophilic antioxidants or in the organic solvents for lipophilic antioxidants without solubilizing agents, which makes it possible to directly compare the radical scavenging capacities of hydrophilic and lipophilic antioxidants. In addition, the high-throughput RDSC assay could be utilized for EC50 value estimation. The high-throughput RDSC assay may be used for screening and investigating potential natural antioxidants.
authors.affiliation: Department of Nutrition and Food Science, University of Maryland, 0112 Skinner Building, College Park, Maryland 20742, USA.
authors.forename: Zhihong
authors.initials: Z
authors.lastname: Cheng
authors.forename: Jeffrey
authors.initials: J
authors.lastname: Moore
authors.forename: Liangli
authors.initials: L
authors.lastname: Yu
mesh_terms: D000975:Antioxidants / Q000032:analysis*; D001713:Biphenyl Compounds; D003124:Colorimetry; D016166:Free Radical Scavengers / Q000737:chemistry*; D007700:Kinetics; D010851:Picrates / Q000737:chemistry*; D015203:Reproducibility of Results; D012639:Seeds / Q000737:chemistry; D012680:Sensitivity and Specificity; D013053:Spectrophotometry; D014908:Triticum / Q000737:chemistry; D027843:Vitis / Q000737:chemistry
chemical_list: D000975:Antioxidants; D001713:Biphenyl Compounds; D016166:Free Radical Scavengers; D010851:Picrates; C004931:1,1-diphenyl-2-picrylhydrazyl