Question

Butyro Refracto meter is used to measure
A. Purity of ghee
B. B R reading of ghee
C. Fat content in milk
D. Vitamin content in milk
Choose the correct answer from the options given below:

• A. A and C are correct
• B. A, B, C, D are wrong
• C. A, B, C, D are correct
• D. A and B are correct

Hint:

Associate specific instruments with their primary function in a dairy lab: Lactometer for specific gravity of milk, Gerber Centrifuge for fat percentage, and Butyro-refractometer for the purity of ghee/butterfat.

Answer 1

The Correct Option is D

Step 1: Concept Overview:
The question concerns the application of a Butyro-refractometer in dairy analysis. A refractometer measures a substance's refractive index.
Step 2: Detailed Analysis:
Evaluating each use case:
A. Ghee Purity: Ghee's refractive index falls within a specific range. The Butyro-refractometer quantifies this as the BR reading. Adulteration with other fats alters the refractive index, making this instrument crucial for purity assessment. This statement is correct.
B. Ghee BR Reading: This is the direct measurement provided by the instrument (Butyro-refractometer reading). This statement is correct.
C. Milk Fat Content: Milk fat is typically determined by methods like the Gerber method (centrifugation) or electronic milk analyzers, not refractometry. This statement is incorrect.
D. Milk Vitamin Content: Vitamin content requires advanced chemical analyses such as chromatography (HPLC), not refractometry. This statement is incorrect.
Therefore, the Butyro-refractometer measures the BR reading of ghee to assess its purity.
Step 3: Conclusion:
Statements A and B are correct, corresponding to option (D).