Meat cum bone meal and leather  meal Reagents

Ammonium molybdate solution: Dissolve 5 g of ammonium molybdate in 100 ml of distilled water and add into 35 ml concentrated nitric acid.

Procedure

Place few feed particles in petri dish. Add 3 to 5 drops of ammonium molybdate and let it stand for 5 to 10 minutes.

Positive results

Presence of meat cum bone meal will produce a greenish yellow colour. Leather meal gives no colour change.