METHOD FOR TEST

1. Test for Metanil Yellow : Take some samaple in a test tube and add some amount of water, shake well. Add few drops of diluted hydrochloric acid, violet colour in the water portion indicates the presence of Metanil Yellow.

2. Test for Starch : Boil the sample with some water in a test tube, cool and add a few drops of iodine solution. Appearance of blue colour indicates the presence of starch.

3. Baudoium Test : Take about one tea spoon full of melted ghee or butter with equal quantity of concentrated hydrochloric acid in a test tub and add to it a pinch of sugar. Shake well and allow to stand. Appearance of crimson red colour shows the presence of vanaspati of margarine.

4. Boric Acid test for Turmeric : Take a small amount of sample in a test tube, add some water and shake. Dip Boric acid paper. If it turns pink, turmeric is present Boric acid paper, can be prepared by dipping a strip of filter paper in the Boric acid solution provided in the kit. Boric Acid solution can be prepared by dissolving 5 gms of boric acid in 100ml concentrated Hydrochloric acid.

5. Mentil Yellow indicator paper : Mentil yellow indicator paper can be prepared by dipping a strip of filter paper in metanil yellow solution (1gm Metanil yellow coal tar colour dissolved in 100ml of water.

6. Oil Soluble coal tar colour : Take a small quantity of chillies powder in a beaker and add 5ml of rectified spirit (alcohol). Dip a small piece of white silk for two minutes. Remove the silk piece and wash with water. If the silk cloth is permanently dyed, it indicates the presence of oil soluble coat tar colour.