DETERMINATION OF ALCOHOLIC ACIDITY[8.5]
8.5.1 Reagents
(a) Neutral Ethyl alcohol – 90% (v/v)
(b) Standard Sodium Hydroxide solution – approx 0.05 N
(c) Phenolphthalein Indicator – Dissolve 0.1 gm in 100 mL of 60% Ethyl alcohol
modern flour mill
raj yadav
*Whatman filter paper No.1 or equivalent is to be used for filtration process
= Titre Value *24.52*Normalityof NaOH / Weight of sample (dry weight)
(Ref: - IS 12711 :1989 Method of Determination of Alcoholic Acidity)
8.5.1 Reagents
(a) Neutral Ethyl alcohol – 90% (v/v)
(b) Standard Sodium Hydroxide solution – approx 0.05 N
(c) Phenolphthalein Indicator – Dissolve 0.1 gm in 100 mL of 60% Ethyl alcohol
modern flour mill
raj yadav
Weigh 5 gm of sample in a stoppered conical flask and add 50 mL of neutral ethyl alcohol. Stopper, swirl gently and allow to stand for 24 hours with occasional swirling. Filter the alcoholic extract through a dry filter paper. Titrate10 mL of the alcoholic extract with standard sodium hydroxide solution to a pink end point using phenolphthalein as indicator. Subtract titre value of blank alcohol.8.5.2 Procedure
*Whatman filter paper No.1 or equivalent is to be used for filtration process
Alcoholic acidity with 90 % alcohol calculated as H2SO4 on dry basis8.5.3 Calculation
= Titre Value *24.52*Normalityof NaOH / Weight of sample (dry weight)
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(Ref: - IS 12711 :1989 Method of Determination of Alcoholic Acidity)
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| raj yadav spn |
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