Tuesday, August 09, 2016

Metanil Yellow in Gram flour - Adulteration of Metanil Yellow in Flour

ADULTERATION OF METANIL YELLOW IN GRAM FLOUR


Adulterant: Metanil yellow-
Metanil yellow is the Toxic non-permitted food color used extensively in Asian countries as food color.

Genuine Product: Gram flour without metanil yellow.

Health effect of Metanil yellow:
·         Disturb Central Nervous system.
·         Paralysis

Reason for adulteration: To increase the brightness of gram flour for look like a better quality.

Test Method:
1.    Title
Detection of Metanil yellow in Gram flour (besan)
2.       Principle
Color development                                   
3.    Reagents
  • Alcohol
  • Hydrochloric acid
4.     Apparatus
4.1.        Test tube
4.2.        Pipette.

5.     Procedure
·         Take half teaspoon of besan in test tube.
·         Pour 3 ml of alcohol in the test tube.
·         Mix up the contents thoroughly up by shaking the test tube.
·         Add 10 drops of hydrochloric acid in it.
·         Appearance of pink color in gram flour indicates the presence of metanil yellow adulteration.

6.    Calculation-
No

7.     Reference/Protocol
·         FSSAI Manual on adulteration, Part – 2.