What is the impact of using non-homogenized samples in COD analysis?

Using non-homogenized samples in Chemical Oxygen Demand (COD) analysis significantly affects the accuracy of results. Homogenization ensures that the sample is representative of the entire volume by mixing all components uniformly. If a sample is not homogenized, certain constituents might be underrepresented or overrepresented, leading to variability in the test results. This is particularly crucial in wastewater analysis, where the concentration of pollutants can vary dramatically within a single sample. Inaccurate results could lead to improper assessments of water quality, which could ultimately affect treatment processes and regulatory compliance. Hence, the emphasis on accurate, representative sampling in COD analysis is vital for reliable outcomes.