Rapid antioxidant capacity screening in herbal extracts using a simple flow injection-spectrophotometric system

► We propose a rapid antioxidant capacity screening in herbal extracts. ► A simple flow injection (FI)-spectrophotometric method was developed. ► It is based on DPPH assay. ► The technique is simple, rapid, accurate (compared with standard method) and reproducible. ► It is useful in screening of large number of samples and for quality control.