TOTAL SUSPENDED SOLIDS (TSS)

TOTAL SUSPENDED SOLIDS (TSS)

Principle :A well-mixed sample is filtered through a weighed standard filter paper and dried to a constant weight at 103^oC to 105^oC.The increase in weight of the filter paper represents the total suspended solids.

Interference: Large floating particles or submerged agglomerates of non-homogeneous material should be excluded from the sample. Because excessive residue on the filter paper may form water-entrapping crust, sample size should be limited to that yielding no more than 200g residue.

APPARATUS

• ·           Beaker

• ·        Measuring cylinder

• ·        Drying oven

• ·        Weighing balance

• ·        Filter paper

• ·        Desiccator

PROCEDURES INVOLVES

•         Dry a filter paper to a constant weight at 103^oC to 105^oC in an oven

•         Weigh the dried filter paper

•         Filter 100ml of the sample through the dried filter paper

•        Carefully transfer the filter paper containing the suspended solids to the oven and dry at 103^oC to 105^oC for about 15mins

•        Take the filter paper to a desiccator and cool

•        Weigh the cooled filter paper

•         Repeat drying, cooling and weighing until weight loss is less than 4% of previous weight

CALCULATION

Mg total suspended solid per liter     =       (A – B) x 1000

                                                                  Sample volume, ml

Where:        A       = weight of filter + dried residue, mg.

                   B       = weight of filter, mg.