What does COLOR measure in a sample?

The measurement of COLOR in a sample specifically evaluates the intensity and hue of color within that sample, often quantified in color units (CU). This analysis can help assess the quality of water or wastewater; for instance, darker samples can indicate higher concentrations of organic materials or contaminants that could affect water treatment processes. By quantifying the color in these units, analysts can get a concrete measure of the sample's overall clarity and purity, which can be vital for determining how much treatment may be necessary to meet regulatory standards or environmental safety.

Other possible assessments referenced in the options, such as the concentration of solid particles, presence of heavy metals, or temperature changes during a reaction, do not directly correspond to the measurement of color. These factors may influence the overall analysis of a sample, but they are distinctly different from what is measured when assessing color intensity specifically.