Saturday, November 21, 2009

Detection of Chicory in Coffee..


Chicory is one of the common adulterants in coffee. Chicory contains insulin (carbohydrates) which on hydrolysis gives levulose. Levulose contained in a coffee sample indicates the presence of chicory.

Boil 10g of ground, powdered coffee sample with 250ml of water. Mix well and add an excess of basic lead acetate to the mixture. Allow the precipitate to settle. If the supernatant liquid is colored, it indicates the presence of chicory.

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