Ascorbic acid and D- isoascorbic acid:
These two kinds of antioxidants was included in the national food safety standard GB 2760 "in table A.2 in all kinds of food according to production needs proper use of food additives". Despite the strict implementation of oxygen control measures in the brewing process, but in beer filtration, temporary storage, filling and other processes to oxygen intake inevitably. In the beer or the beverage shelf life, even in very small amounts of dissolved oxygen can cause taste oxidation of irreversible change, add a certain amount of ascorbic acid (sodium) and D- isoascorbic acid (sodium) can consume the dissolved oxygen, so as to prevent and reduce the oxidized flavor. It is generally recommended that you use for 25ppm, by detecting and calculating the beer or beverage air quantity and dissolved oxygen, which can get the dose range of needs, through the test results to determine the actual usage.
Sodium metabisulfite, sodium sulfite, Sodium Bisulfite:These antioxidants are included in the national food safety standard GB 2760"food additives in table A.1 allows the use of varieties, application range andmaximum usage or residue", is permitted for use on beer and malt beverages,Wine, wine, beer in the Embassy in dosage of 10ppm (0.01g/kg), usually with ascorbic acid (Na) and D- isoascorbic acid (sodium) used in conjunction, withdissolved oxygen consumed quickly after filling in the bottled beer, it is recommended to use 10ppm.
Polyphenol & Glucoside Rich Hop Extract
Fresh hops antioxidant (radical) ability is very strong, the anti DPPPH value reached more than 90%, obtain polyphenol glycosides hop extract can be through the consumption of ethanol extraction and concentration of polyphenols, natural antioxidants (to bitter or not bitter), added to the boiling pot, can be in the annihilation of boiling process saccharification, freedom the base, so as to prolong the storage period of beer, at the same time by adding hop glycosides can also improve beer flavor. It is recommended to use 30-80ppm.
