Question

Samples collected for BOD (Biochemical Oxygen Demand) analysis can be preserved by refrigerating between ___ and ___ degrees Celsius.

A) 0°C and 4°C
B) 5°C and 15°C
C) 15°C and 25°C
D) 25°C and 35°C
E) 35°C and 45°C

Answer 1

Samples collected for BOD analysis can be preserved by refrigerating between 0°C and 4°C.

Step-by-step explanation:

The correct answer is A) 0°C and 4°C. Samples collected for BOD analysis can be preserved by refrigerating between 0°C and 4°C. Refrigerators used in home kitchens or in the laboratory maintain temperatures between 0°C and 7°C, which inhibits microbial metabolism and slows down the growth of microorganisms. By storing the samples at these temperatures, the growth and activity of bacteria that cause BOD can be significantly reduced, preserving the samples for further analysis.