Easily detect milk adulteration

Test one .. Detection of water in milk
1.Put a drop of milk on a polished slanting surface.
2.Pure milk either stays or flows slowly leaving a white trail behind .
3. Milk adulterated with water will flow immediately without leaving a mark .
Test Two.. Detection of detergent in milk ..
1. Take 5 to 10 ml of sample with an equal amount of water .
2. Shake the contents thoroughly.
3. If milk is adulterated with detergent, it forms dense lather .
4. Pure milk will form very thin foam layer due to agitation.
Test three.. detection of starch in milk and milk products.(khoya, chhena,paneer).
1. Boil 2 to 3 ml of sample with 5 ml of water.
2. Cool and add 2-3 drops of tincture of iodine.
3. Formation of blue colour indicates the presence of starch .
(In case of milk,addition of water and boiling is not required).