Milk could be found adulterated by adding water or by removing the cream or by adding adulterants like soap, acid, starch, table sugar, chemicals like formalin, artificial coloring agents like Annatto, ceramel, coal tar colors and preservatives like formaldehyde, boric & other acids etc.
Samples of prominent milk brands such as Mother Dairy and Amul have been found to be of substandard quality. Delhi Health Minister Satyendra Jain on 4 May 2018.
Adulteration of milk reduces the quality of milk and can even make it hazardous. Many people think how can we test milk at home? It is quiet easy. Today, we would like to provide you with some really helpful information.
Now you can check the purity of milk at your home. Follow the steps here to identify if the milk you buy is adulterated.
Milk slip test
Put a drop of milk on a polished vertical surface. If it stops or flows slowly, leaving a white trail behind, it is pure milk. Milk mixed with water or other agents will flow down immediately without a trace.
Reduction test – Boil some milk on a slow heat while moving it with a spoon till it becomes solid (khoya). Take it off the heat and wait for 2-3 hours. If the produced solid is oily, the milk is of good quality, if it’s not, it means the milk is harmful.
Checking for Synthetic Milk
All you have to do is sniff! If you can sense a soapy odour and if it feels soapy when rubbed with fingers, then the milk has been made by mixing chemicals.
Pure milk is naturally sweet. If the milk in your fridge tastes bitter or sour, then it is either stale or has possibilities of being adulterated with detergent and soda.
Formalin in Milk
Formalin is used for preservation purposes. Since its transparent in color and can preserve milk for long time, packaged manufacturers use it for adulteration purposes. To test for formalin existence in milk, take 10 ml of milk in test tube and put 2-3 drops of sulphuric acid into it. If a blue ring appears at the top, milk is adulterated else not.
Add 2 tablespoons of salt to 5 ml of milk. If the mixture turns blue, then the milk is adulterated.
Urea is dangerous. Mix half tbsp of milk and soyabean powder together and shake well. Dip a litmus paper for few seconds and if there is a color change from red to blue then it means the milk has urea.
Tests which can be done at home for the adulteration in Milk Products:
Starch in Khoya & its products
Boil a small quantity of sample with some water, cool and add a few drops of Iodine solution. The Formation of blue colour indicates the presence of Starch.
Starch in Chhena or Paneer
Boil a small quantity of sample with some water, cool and add a few drops of Iodine solution. The formation of Blue colour indicates the presence of starch.
We wish all reading this page to drink pure milk and not the poisoned, adulterated milk.