HOW TO DETERMINE CITRIC ACID IN FRUIT JUICE

DETERMINATION OF CITRIC ACID IN FRUIT JUICE

AIM:
To estimate citric acid content in fruit juice.

APPARATUS:
Burette, conical flask, pipette.

REAGENT:
0.1M NaOH, phenolphthalein.

PRINCIPLE:
Citric acid neutralized by NaOH; endpoint indicated by pink color.

PROCEDURE:

• Pipette 10ml of juice into a flask.

• Add 2–3 drops phenolphthalein.

• Titrate with NaOH to pink endpoint.

CALCULATION:
% Citric Acid = Titre × 0.064 × 100 / Volume of sample