Water Testing

Water Testing

PH Value (Hydrogen Ion Concentration)

The determination shall be carried out either by theelectrometric method or the indicator method. In case of dispute, theelectrometric method shall be considered as the referee method.

NOTE
Resistant glass bottles shall be used for the sample and this test shall be done as soon as possible after the sample is drawn, Samples kept for a long time are likely to change inpH due to escape of dissolved gases, such as carbon dioxide.

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Suspended Matter and Total Dissolved Solids

For determining suspended matter and total dissolved solids, the following procedure shall be adopted. Where the suspended matter is high, the same shall bedetermined by the method given in and total dissolved solids shall be found by subtracting the suspended matter (as mg/I) from total solids (as mg/l).

 

When the suspended matter is low, the sample shall be filtered through a filter paper and the total dissolved solids determined in the filtrate by a procedure of evaporation given in Suspended matter shall then be obtained by subtracting total dissolved solids (as mg/l) from total solids (as mg/l).

Total Alkalinity

The sample is titrated against standard acid using methyl orange indicator

Alkalinity To Phenolphthalein

The sample is titrated against standard acid using phenolphthalein indicator

Total Hardness

Total hardness of water is the sum of the concentrations of all the metallic cations other than cations of the alkali metals, as eq calcium carbonate concentration.

In most waters, nearly all of the hardness is due to calcium and magnesium ions, but in some waters, measurable concentrations of iron, aluminium, manganese, zinc and other metals have to be taken into consideration.

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