What is the holding time for BOD samples?

The holding time for Biochemical Oxygen Demand (BOD) samples is indeed 48 hours due to the nature of the BOD test, which measures the amount of oxygen consumed by microorganisms in the degradation of organic material in the sample over a specified time period.

During storage, the sample must be preserved to minimize changes in the organic matter concentration and microbial activity, which could alter the test results. If BOD samples are analyzed within 48 hours, they are held at a temperature of 1 to 4 degrees Celsius, ensuring that the microbial processes occurring in the sample do not significantly impact the results.

If samples are held longer than the designated holding time, the accuracy of the BOD measurement may be compromised. Therefore, following the 48-hour guideline ensures that the test results reflect the true BOD levels in the water sample.