Question

The BR reading of ghee normally varies from ________

• A. 50-56
• B. 41-43
• C. 38-40
• D. 28-30

Hint:

Remember key quality parameters for milk and milk products as they are frequently tested. For ghee, the BR reading (40-44 at 40°C) and Reichert-Meissl (RM) value (minimum 28) are the most important ones to memorize.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
The "BR reading" refers to the measurement taken using a Butyro-refractometer. This instrument measures the refractive index of fats and oils. For ghee, this reading is a standard quality and purity test. The reading is standardized at a specific temperature, usually 40°C.
Step 2: Detailed Explanation:
Pure ghee, whether from cow or buffalo milk, has a characteristic refractive index. Adulteration with cheaper vegetable oils or animal body fats alters this refractive index.
According to FSSAI (Food Safety and Standards Authority of India) standards, the Butyro-refractometer reading for ghee at 40°C should be within the range of 40.0 to 44.0.
Let's analyze the given options in light of this standard range:
50-56: Too high.
41-43: This range falls perfectly within the standard acceptable range of 40-44.
38-40: The lower end is below the standard minimum of 40.0.
28-30: Far too low.
Step 3: Final Answer:
The normal BR reading for ghee at 40°C is in the range of 40-44. The option that best fits this is 41-43.