Packed milk from some brands as well as milk purchased from milk-vendors can be adulterated so its important to check for them before consuming. Here are some simple tests that you can perform at home to check the quality of the fresh milk you buy.

1. How to check the
purity of fresh milk
at home easily?

2. Introduction
• Milk is a common drink of our daily diet.
• But not every-time the milk we take is pure; it may have urea,
formalin, vanaspati, starch and water as impurity.
• Packed milk from some brands as well as milk purchased from milk-
vendors can be adulterated so its important to check for them before
consuming.
• Here are some simple tests that you can perform at home to check
the quality of the fresh milk you buy.

3. Water in milk
• The presence of water can be detected
by putting a drop of milk on a polished
slanting surface.
• The drop of pure milk flows slowly
leaving a white trail behind it, whereas
milk adulterated with water will flow
immediately without leaving a mark.

4. Starch Test
• If your vendor has added starch to milk,
you can detect it by adding 2
tablespoons to salt (iodine) to 5 ml of
milk.
• Mixture will turn blue if milk is
adulterated else it remains intact.

5. Checking for Synthetic
Milk
• Synthetic milk is made by mixing
chemicals and things like soap in
natural milk.
• Synthetic milk can be easily identified
by bad taste.
• It feels soapy when rubbed and turns
yellowish when heated.

6. Reduction Test
• Boil milk on slow heat for 2-3 hours till
it solidifies and become hard (khoya).
• Rock solid, rough residue means the
milk is adulterated while oily residue
means its of good quality.

7. Vanaspati/Dalda in milk
• Vanaspati is not good for health if
consumed in big quantity.
• To check if milk is adulterated with
vanaspati, add 2 tbps of hydrochloric
acid and 1 tbsp of sugar to 1 tbsp of
milk.
• If the mixture turns red, its impure.

8. 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.

9. Test for urea in milk
• One of the most common form of
adulteration in milk is mixing of
urea since it doesn’t changes the taste
and is little difficult to detect.
• To check for urea in milk, mix half
tablespoon of milk and soyabean (or
arhar) powder together and shake well.
• After 5 minutes, dip litmus paper for 30
seconds and if there is a color change
from red to blue it means the milk has
urea in it.

10. Lactometer
• Using the lactometer instrument is very
simple.
• Put some milk in the test-tube.
• Dip the meter bulb in it, the bulb going in
first.
• You will notice that the meter bulb floats.
• The reading on the meter indicates how
pure or impure your milk is.
• The deeper the bulb sinks, the more
dilute/impure the milk.
• If the reading is at the red mark, it shows
that the milk is rich and pure.

11. Conclusion
• More than 65% of milk sold in India is impure.
• It either has water or any other type of impurity in them.
• Though government is taking steps to stop such activities but its also
our job to ensure we’re taking fresh, nutritious, non-adulterated food
products.
• Frezu provides pure farm fresh cow milk directly from the farm to the
customers, there is no chance of adulteration and mixing water.

12. Thank
You!
customercare@frezu.in
044-40100500, 044-40100555