VCP 511: Diagnostic Laboratory Section

DETECTION OF ZINC

Aim

• To detect presence of zinc in biological material.

Reagents required

• 10% ammonium carbonate
• 20% ammonium sulfide
• 15% potassium ioide solution 

Test	Procedure	Inferences
Test 1	1 ml of test solution + a drop of 10% ammonium carbonate	Appearance of white colour / precipitate
Test 2	1 ml of test solution + a drop of 20% ammonium sulfide	Appearance of white colour; soluble in excess
Test 3	1 ml of test solution + a drop of 15% potassium ioide solution	No reaction