Question

Calculate F0-value for Clostridium botulinum provided the D10 value at 121°C is 0.23 minutes, assume a 12D process:

• A. 2.8 min
• B. 4.8 min
• C. 3.8 min
• D. 6.8 min

Hint:

Always ensure the D10 values are correctly identified and used in calculations for accurate thermal processing times in food safety applications.

Answer 1

The Correct Option is A

Step 1: Concept
The F0-value is a measure of the thermal inactivation of microorganisms, specifically used in sterilization processes like pasteurization or canning. It is calculated based on the D10 value, which represents the time required to reduce the population of a microorganism by 90% at a specific temperature.

Step 2: Meaning
D10: Time required for a 90% reduction in microbial population at a given temperature. F0-value: Thermal processing time calculated using D10 values and expressed as minutes at 121°C, which is the standard pressure used in canned food sterilization.

Step 3: Analysis
Given: - D10 value at 121°C = 0.23 minutes - A 12D process means a total thermal processing time of 12 times the D10 value. First, calculate the total F0-value for the 12D process: \[ \text\{F0-value\} = 12 \times \text\{D10 value\} \] Substitute the given D10 value into the equation: \[ \text\{F0-value\} = 12 \times 0.23 \, \text\{minutes\} \] Perform the multiplication: \[ \text\{F0-value\} = 2.76 \, \text\{minutes\} \] Since F0-values are typically rounded to one decimal place for practical purposes in food safety and processing standards, we round 2.76 minutes to 2.8 minutes.

Step 4: Conclusion
The calculated F0-value is approximately 2.8 minutes. Final Answer: (A)