Potassium hydroxide solution c(KOH) = 0.5 mol/l (0.5 N), in ethanol, reag. Ph. Eur., ready-to-use volumetric solution for titration in non-aqueous media, Titriplex® | Sigma-Aldrich,Combined 5.5 V Super Capacitor For Sale | KAMCAP China Supercapacitor Supplier,Combined 5.5 V Super Capacitor For Sale | KAMCAP China Supercapacitor Supplier,0.05mol/L よう素溶液 VS 500mL 42000155,Hydromillex syringe filter pore size 0.2 μm, diam. 25 mm, hydrophobic PTFE membrane with stripes of hydrophilic coating, non-sterile | Sigma-Aldrich,