질산의 경우 침전물이 발생하지 않았으나 황산을 주입한 경우 CaSO4가 형성되어 침전물이 발생하는 것을 확인하였다.
In the case of nitric acid, there was no precipitate, but when sulfuric acid was injected, CaSO4 was formed and a precipitate was observed.