ABSTRACT
This chapter deals with the introduction and general discussion of the physical properties of a sample. It describes that the typical, meaningful, and traditional parameters are color, conductance, odor, solids, and turbidity. However, physical properties cannot be separated entirely from chemical composition. Color in water may result from the presence of natural metallic elements, humus and peat materials, plankton, weeds, and industrial parameters. To determine color, turbidity must be removed by filtration or centrifugation prior to analysis. In its pure form, water does not produce any taste or odor. Many potentially toxic waters and foods can be avoided by smell and taste senses. Conductivity is a numerical expression of the ability of a solution to carry an electric current. This ability depends on the presence of ions, on their total concentration, and on the temperature of the measurement. Conductivity is measured directly using a self-contained conductivity meter.
