Elementary plant Biochemistry and Biotechnology (2+1)

iv. Polanski number

Polanski number

• Ghee may be adulterated by the addition of insoluble, non-volatile fatty acids (by addition of animal fat)
• This can be tested by finding out the Polanski number
• It is defined as the number of millilitres of 0.1 N potassium hydroxide solution required to neutralise the insoluble fatty acids (not volatile with steam distillation) obtained from 5 gm of fat