Method Abstract #135, Acidity in Yoghurt and Milk Products

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Acidity in Yoghurt and Milk Products

Method Abstract #135

Scope and Application

This method conforms to Standard Methods for the Examination of Dairy Products, 15.021 and 15.022

Method Summary

This method involves the titration of milk or milk products with standardized sodium hydroxide to endpoint of pH 8.3, signifying “phenolphthalein” or total acidity. Acidity is expressed as a percentage of lactic acid (1 mL of 0.1N Sodium Hydroxide (NaOH) = 0.009 grams of lactic acid).

Sample Titration Curve 

    

Method Performance

       

RSD values are better than those specified in Standard Methods 

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