testing food adultration at home-Techniques

Techniques for testing food adultration at home

Try these tricks to know whether the food is adulterated or not

Turmeric powder

Adulterant : Metanil yellow

Test : Mix the sample to water and add few drops of HCL/commonly available acid at home. If it turns violet or purple color, it indicates presence of metanil yellow.

Green vegetables

Adulterant : Malachite green

Test : Take a small portion of the vegetable sample and place it over a moistened white blotting paper. If coloured impression are seen on the blotting paper, then it indicates the presence of Malachite green.

Ice cream

Adulterant : Washing powder

Test : Squeeze a few drops of lemon juice on the ice cream.If it starts to froth and bubble, it indicates the presence of washing powder.

Black pepper

Adulterant : Papaya seeds

Test : Put the seeds sample in alcohol. Black pepper seeds sink while papaya seeds float.

Coffee powder

Adulterant : Chicory powder

Test : Take a glass of water and gently sprinkle coffee powder on the surface of water. chicory will start to sink within a few seconds leaving a trail of colour behind whereas coffee floats.

Mustard seeds

Adulterant : Argemone seeds

Test : when crushed, mustard seeds are smooth on the outside and are yellow in the inside whereas argemone seeds have a rough outer surface and are white inside.

Sugar and salt

Adulterant : Chalk

Test : Dissolve sugar/salt in a glass of water. The chalk settles down.

Honey

Adulterant : Water

Test: A cotton wick dipped in pure honey burns when ignited with a match stick. Presence of water will not allow the honey to burn, if it does will produce a cracking sound.

Tea powder

Adulterant : Iron fillings, used tea, coloured leaves

Test : Move a magnet through the tea powder sample. Iron fillings will be separated. Sprinkle the tea leaves on wet filter paper. Pink or red spots show color. Rub leaves on white paper, artificial color comes out on paper.

Red chilli powder

Adulterant : Brick powder

Test : Put red chilli powder in a glass of water. Brick powder settles down to the bottom fast and chilli powder slowly.

Milk

Adulterant : Water

Test : Add few drops of lemon juice to milk sample. Pure milk curdles whereas adulterated milk does not and if the curdled milk is like rubbery lump, it indicates adulteration of milk.