Appropriately sifted ghee whose temperature is around 40°C is taken; 2-3 drops of it is poured in to the butyrorefractometer by the side of the glass pole. Presently the perusing is noted by the scale put over the meter. Care must be practiced to keep up the temperature of water that is streaming over the thermometer to be at 40°C. In the event that the temperature goes amiss, at that point the outcomes acquired may not be precise. The ordinary BR estimation of ghee ranges somewhere in the range of 40 and 43.
Boudoir Test (Detection of contaminated of ghee with vanaspathi or hydrogenated vegetable oil)
According to the counteraction of food contaminated demonstration, it has been made obligatory to add 5% sesame oil to vanaspathi to recognize the presence of vanaspathi in ghee through Baudoin test. The herbal ghee standard behind the test is advancement of lasting red tone with furfural within the sight of packed hydrochloric corrosive in ghee corrupted with vanaspathi.
How to identify?
Take 5 g of liquid sifted ghee in a test cylinder and add 5 ml of concentrated hydrochloric corrosive and 0.1 ml furfural arrangement in liquor (2%) and blend the substance completely and it is permitted to stay undisturbed for 10 min. Advancement of dark red shading shows that the ghee is defiled with vanaspathi.
- Location of mineral oil in ghee
Around 2 g of ghee is saponified with 25 ml of half alcoholic potassium hydroxide for 60 minutes. At that point the saponified substance is moved to a recepticle containing 100 ml of water. Improvement of turbidity shows the contaminated of mineral oil in ghee.