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Question

The conversion factor for estimating crude protein content of food from its nitrogen content is

The correct answer is
6.25

Understanding the Crude Protein Conversion Factor

To estimate the crude protein content in food, a standard conversion factor is applied to the measured nitrogen content. This method is widely used in food analysis and nutrition.

Explaining the Conversion Factor

The common conversion factor used is 6.25. This value is based on the assumption that proteins contain an average of 16% nitrogen.

The calculation is derived as follows:

$ \text{Conversion Factor} = \frac{100\% \text{ (Protein)}}{\text{Average Nitrogen in Protein (\%)}}$

$ \text{Conversion Factor} = \frac{100}{16} = 6.25$

Calculating Crude Protein

The formula used is:

$ \text{Crude Protein (\%)} = \text{Nitrogen Content (\%)} \times 6.25 $

This factor allows for a straightforward estimation of crude protein based on the experimentally determined nitrogen levels in a food sample.

Therefore, the correct conversion factor is 6.25.

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