What is the result of passing water through a very fine mesh filter in TDS measurement?

Passing water through a very fine mesh filter during TDS (Total Dissolved Solids) measurement is intended to obtain the residue that consists of dissolved solids. This process separates the soluble substances from the liquid phase, allowing the measurement of those solids that remain after the water passes through the filter.

When water filters through this fine mesh, any particulate matter that is larger than the mesh openings will be captured, while dissolved ions and molecules, which contribute to total dissolved solids, pass through the filter. Consequently, the measuring of the remaining solids after evaporating the filtered water accurately reflects the TDS of the original sample.

This method effectively isolates the solids that are truly dissolved in the water, allowing for a precise measurement of TDS, which is essential for understanding the water's quality and impact on both human health and the environment.