Turbidity is an expression of the optical property that causes light to be scattered and absorbed and caused by suspended solids, such as sand, silt and clay, floating in water. Light reflects off these particles, which makes the water look cloudy or dirty. Turbidity is expressed in nephelometric turbidity units (NTU) or Formazin turbidity units (FTU), depending on the method and equipment used. Clarity of water is important for human consumption and Manufacturing processes such as beverages, and many food products need clear water that makes turbidity, a critical parameter in water quality assessment.

Material and Apparatus

·         Turbidity meter

·         Sample Cell

·         Tissue paper

 Procedures

·         Turn on turbidity meter

·         Fill the cell with the sample to be tested

·         Wipe the liquid that spills out using tissue paper

·         Insert the sample cell into the turbidity meter and click on read

·         The right will pass through the sample and the result appears on screen of turbidity meter.

References

1.      Dr. (Mrs.) Leena Deshpande, Water Quality Analysis Laboratory Methods, National Environmental Engineering Research Institute (NEERI), Nagpur

2.      Manual of Methods of Analysis of Foods, New Delhi, 2016

3.      Frank R. Spellman, Water and Wastewater Treatment Plant Operations Handbook of, Lewis publishers, 2003, ISBN 1-56670-627-0

4.      Center for affordable water and sanitation technology, Introduction to Drinking Water Quality Testing, October 2013