NURSING ANM AND GNM

Detailed explanation-1: -4.2 Gutzeit Test 5 ml. of dilute Sulphuric Acid is poured over the contents. The evolved gas is purified by passing over Lead Acetate paper (to absorb Hydrogen Sulphide gas) and is reacted finally with Mercuric Chloride test paper. A yellow stain on the paper indicates the presence of Arsenic.

Detailed explanation-2: -Arsenic gives a black color precipitate as its oxide. Zinc doesn’t give marsh test nor aluminum. This test is for poisons detection and we know that aluminum is used in food packaging.