Ammoniumijzer(III)sulfaatoplossing 0,2 % (m/m) : los 0,2 g ammoniumijzer(III)sulfaat-dodecahydraat op in 50 ml water ; voeg toe 10 ml salpeterzuur 10 % (v/v) en verdun tot 100 ml met water.
Ammonium iron (III) sulphate solution, 0 72 % m/v. Prepare by dissolving 0 72 g of ammonium iron (III) sulphate dodecahydrate in 50 ml of water, add 10 ml of nitric acid, 10 % v/v, and dilute to 100 ml with water.