Environmental Hygiene: Procedure

Procedure

EXERCISE-3: ESTIMATION OF COLOUR

Pure water is colourless, but water in nature is often coloured by foreign substances. Water whose colour is partly due to suspended matter is said to have apparent colour.

Colour contributed by dissolved solids that remain after removal of suspended matter is known as true colour .

Source of colour

Water contact with leaves, weeds or wood takes on yellowish tint. Iron oxide causes reddish water and manganese oxide causes brown or blackish water

Estimation

The colour of water sample is studied in comparison with distilled water, keeping them is Nessler’s cylinders and viewing vertically against white background

Last modified: Thursday, 21 June 2012, 9:03 AM

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VPE 511: Environment and Environmental Hygiene (2+1)

Procedure

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