Sodium Thiosulfate 0.1 Normal Solution

Turbidity is a principal physical characteristic of water. It is caused by suspended matter or impurities that interfere with the clarity of the water. These include clay, silt, finely divided inorganic and organic matter, soluble colored organic compounds, and plankton and other microscopic organisms. Turbidity is the measure of relative clarity of a liquid. Clarity is required for drinking water and in manufacturing uses