Yadda za a tsaftace crucible ain?

Kuna iya gwada shi tare da ruwan shafa na chromic acid. Hanyar wanke ruwan shafa na chromic acid: ruwan shafa mai chromic acid (100g potassium dichromate narkar da shi a cikin 200ml mai tattara sulfuric acid), kula da aminci lokacin shiryawa, kula da shi, kuma ku tuna don tunawa.