Quantitative and qualitative determination of phenolic compounds and antioxidant activity in Centaurea cyanus L. flowers

This dataset contains results of phenolic compound determination and antioxidant activity assessment in extracts of cornflower (Centaurea cyanus L.) (three extraction solvents: water (H2O), 1% HCOOH, 80% MeOH) flowers using analytical approaches: · Spectrophotometry – total phenolic content (TPC, Folin-Ciocalteu method, gallic acid standard, GAE) and total flavonoid content (TFC, AlCl₃ method, quercetin standard, QE); Antioxidant activity – ABTS method (ABTS•⁺ radical, Trolox standard) and DPPH method (DPPH• radical, Trolox standard); results expressed as mmol Trolox/g DW; · HPLC-DAD – quantitative determination of 16 individual phenolic compounds; · LC-MS-QTOF – qualitative analysis (compound identification based on exact mass, spectral library matching and references);