WAEC - Chemistry (2000 - No. 30)
Which of the following procedures is suitable for identifying the food colouring added to a pastry sample?
carry out some food tests
examine the pastry sample under a microscope
Do a chromatogram of the colouring extract
.determine the molar mass of the colouring
Uitleg
Chromatography is used for quality control in the food industry, by separating and analyzing additives, vitamins, preservatives, proteins, and amino acids. It can also separate and detect contaminants such as aflatoxin, a cancer-causing chemical produced by a mold on peanuts.