# 71: ACIDITHIOBACILLUS THIOOXIDANS MEDIUM ## Main sol. 71 3 g KH2PO4 0.5 g MgSO4 x 7 H2O 3 g (NH4)2SO4 0.25 g CaCl2 x 2 H2O 5 g Na2S2O3 x 5 H2O 1000 ml Distilled water 1. Prepare the medium without thiosulfate, adjust pH to 4.4 - 4.7 and autoclave at 121°C for 15 min. Sterilize thiosulfate separately by filtration and add after autoclaving. 2. Note: Incubate statically without shaking.