How to test adulteration in milk
For Neutraliser
In 5 ml of milk add 5 ml of alcohol followed by about five drops of rosalic acid. If the colour changes to pinkish red, the milk is adulterated with sodium carbonate or sodium bicarbonate and is unfit for human consumption
For Urea
Mix 5 ml of milk with 5 ml of paradimethyl amino benzaldehyde. If the solution turns yellow, the milk is adulterated with urea
For Hydrogen Peroxide
Add five drops of paraphenylene diamine to 5 ml milk and shake it well. Adulterated milk will turn blue
For Formalin
In a test tube containing 10 ml of milk add 5 ml of concentrated sulphuric acid from the sides without disturbing it. A violet or blue ring will appear at the intersection of the two layers indicating presence of formalin
For Sugar
To 10 ml of milk add 5 ml of hydrochloric acid and 0.1 g of resorcinol in a test tube. Shake it well and place the test tube in boiling water for five minutes. Adulterated milk will turn red
For Starch
Boil 3 ml of milk and then cool to room temperature. Add two to three drops of 1 per cent iodine solution. It will turn blue.
For Glucose
Dip a diacetic strip in milk for about one minute. If the strip changes colour, the milk contains glucose
Courtesy: Down to Earth
പതിവായി പാല് കുടിച്ചാല് ഹൃദയ സംബന്ധമായ രോഗങ്ങളെ അകറ്റി നിര്ത്തി ആയുസ്സ് വര്ദ്ധിപ്പിയ്ക്കാം. ബ്രിട്ടനിലെ ശാസ്ത്രജ്ഞരാണ് പാലിന്റെ പുതിയ ഗുണങ്ങള് കണ്ടെത്തിയത്.
