Barium chloride dihydrate

Acetone, calcium carbonate, sodium carbonate, ethanol, potassium persulphate, and sodium acetate were purchased from IDALIA (Radom, Poland), Folin-Ciocalteu’s phenol reagent, Trolox, gallic acid, diphenyl-2-picrylhydrazyl (DPPH), azino-bis-3-ethyl-benzthiazoline-6-sulphonic acid (ABTS), ferric reducing antioxidant power (FRAP), and tripyridyl-S-triazine (TPTZ) from Archem (Łany, Poland), acetic acid, activated carbon, oxalic acid, ascorbic acid, sodium bicarbonate, 65% nitric acid, ammonium molybdate tetrahydrate, ammonium metavanadate, magnesium nitrate, barium chloride dihydrate, cyclohexane, sodium sulphate from CHEMPUR (Piekary Śląskie, Poland), 2, 6-2, 6-dichlorophenolindophenol sodium salt hydrate from Acros Organics (Argenta; Poznań, Poland), hydrochloric acid (38%), chloroform and methanol from Stanlab (Lublin, Poland), standard solutions and detergent Tween TM 80 from Merck (Darmstadt, Germany), 2-undecanone and BF₃/MeOH from Sigma-Aldrich (Saint Louis, MO, USA), hexane and sodium bicarbonate from UQF (Wrocław, Poland), n-hexane (99%) from POCH Basic (Gliwice, Poland), helium from Air Products (Warsaw, Poland), potassium hydroxide from Avantor (Gliwice, Poland). The reagents were of analytical grade.

Acetone, calcium carbonate, ethanol, potassium persulphate, sodium acetate, and sodium carbonate were purchased from IDALIA (Radom, Poland); azino-bis-3-ethylbenzthiazoline-6-sulphonic acid (ABTS), diphenyl-2-picrylhydrazyl (DPPH), ferric-reducing antioxidant power (FRAP), Folin–Ciocalteu's phenol reagent, gallic acid, tripyridyl-S-triazine (TPTZ), and Trolox were purchased from Archem (Łany, Poland); acetic acid, activated carbon, ammonium metavanadate, ammonium molybdate tetrahydrate, ascorbic acid, barium chloride dihydrate, cyclohexane, magnesium nitrate, 65% nitric acid, oxalic acid, sodium bicarbonate, and sodium sulfate were purchased from CHEMPUR (Piekary Śląskie, Poland); 2,6-dichlorophenolindophenol sodium salt hydrate was purchased from ACROS ORGANICS (ARGENTA; Poznań, Poland); chloroform, hydrochloric acid (38%), and methanol were purchased from STANLAB (Lublin, Poland); standard solutions and Tween TM 80 were purchased from Merck (Darmnstadt, Germany); 2-undecanone and BF₃/MeOH were purchased from Sigma-Aldrich (Saint Louis, MO, USA); hexane and sodium bicarbonate were purchased from UQF (Wrocław, Poland); n-hexane (99%) was purchased from POCH Basic (Gliwice, Poland); helium was purchased from Air Products (Warsaw, Poland); and potassium hydroxide was purchased from Avantor (Gliwice, Poland).