How is True color defined in laboratory analysis?

True color in laboratory analysis refers to the color of a water sample that is measured after any turbidity is removed from that sample. This is important because turbidity, caused by suspended particles, can interfere with color measurement. By removing turbidity, analysts can obtain a more accurate representation of the water's color that is solely due to the dissolved substances present.

This method ensures that the results reflect the color imparted by dissolved materials without the confounding effects of solids that may be physically suspended in the sample. Such clarity in measurement is critical for assessing water quality, especially in contexts where color can indicate the presence of specific contaminants or changes in chemical composition.