Total dissolved solids in water

Estimation of total dissolved solids in water:

Requirements: Glass and plastic beaker Spirit lamp

Funnel and filter paper Boiling chips

Procedure:

. Filter the sample water.

. Weigh the glass beaker W1 g

. Take 50 mL of sample water in the glass beaker.

. Evaporate the water carefully until the glass beaker becomes dry.

. Cool and weigh the glass beaker with the boiling chips again, W2 g.

Calculation: Total solid (ppm) = (W1 – W2) x 2 x 104 Filterable residue:

Procedure:

. Weigh the empty glass beaker with boiling chips, W1 g.

. Filter the sample water into a plastic beaker.

. Pour 50 mL of filtered water into the glass beaker.

. Evaporate the water carefully until the glass beaker becomes dry.

. Cool and weigh the glass beaker with the boiling chips again, W2 g.

Calculation:

Filterable residue (ppm) (W2 – W1) x 2 x 104
Non-filterable residue (ppm) = total solid – filterable residue.