Strontium is a chemical element with symbol Sr. It is a soft grey silvery metal. It is found in various salts like Strontium chloride, Strontium nitrate and Strontium carbonate as Sr2+ ion. In group V, Strontium ions are precipitated as their carbonates by adding ammonium carbonate to their solution. Strontium ion reacts with ammonium sulphate to form a white precipitate o strontium sulphate and it also imparts crimson red colour to the flame.
This video explains how to test the presence of Strontium ion in a given salt.