At what temperature is it most accepted to preserve samples for refrigeration?

The accepted temperature for preserving samples in refrigeration is generally established at less than or equal to 4 degrees Celsius. This temperature is critical because it effectively slows down microbial growth and biochemical activities, ensuring that the integrity of the sample is maintained during transport and storage prior to analysis.

Keeping samples at this temperature helps to minimize degradation of organic material and chemical properties that could skew test results, which is essential in wastewater analysis where accurate data is crucial for evaluating treatment processes and compliance with regulatory standards.

While options that suggest higher temperatures may still limit microbial activity to some extent, they do not provide the optimal conditions recommended for preserving the stability and quality of wastewater samples.