The invention discloses a compound acid stabilizer for
anthocyanidin. The compound acid stabilizer is prepared from 8-16 parts of 50% of D-
gluconic acid in percentage by weight, 4-8 parts of
ferulic acid and 2-6 parts of coffeic acid. The compound acid stabilizer for the
anthocyanidin is diluted 60-100 times with a pH 3.0
phosphate buffer reacts with 4 parts of the
anthocyanidin under the reaction condition that the pressure is 100-400 MPa and pressurization is conducted for 1-5 min; stabilized anthocyanidin is obtained, the treated anthocyanidin is modified properly, the light and
heat stability is improved, and the storage life is long. Edible
organic acid can improve the activity of the anthocyanidin, compound acid has higher removal rate for DDPH and
ABTS, has the removing capacity higher than 90% for the DDPH and the
ABTS at the low concentration of 20[mu]g / mL and is several times higher than a control and VC, and the
antioxidant activity of the anthocyanidin is improved. The anthocyanidin is extracted by a non-thermal high-
voltage pulsed
electric field, thus, the extraction rate is increased.