Environmental Engineering LaboratoryBy: Ngoc Thuan Le

Total Suspended Solid (TSS)

Principle: A well-mixed sample is filtered through a weighted standard glass fiber filter and

the residue retained on the filter is dried to a constant weight at 103-105oC.

Apparatus: Membrane filter funnel, Filtration apparatus with reservoir and coarse (40- to

60- µm) fritter disk as filter support. Suction flask of sufficient capacity for sample size

selected, Drying oven for operation at 103-105oC, Desiccator, Analytical balance capable of

weighting to 0.1mg.

Procedure:

1. Pretreatment filter: filtrate 100ml dW through filter with filtration apparatus and

remove filter to an inert planchet.

2. Dry filter and planchet at 102-105 oC for 2hrs

3. Remove and store in a desiccator for 20 mins to balance temperature and weigh,

weight dried filter and planchet.

4. Install dried filter and begin suction, and filtrate 100ml of well-mixed sample

5. Dry filter and planchet at 102-105 oC for 2hrs

6. Remove and store in a desiccator for 20 mins to balance temperature and weigh,

weight dried filter and planchet.

Duplicate determinations should agree within 5% of their average.

Caculation:

(A-B) x 1000

SS (mg/L) =

Sample volume, mL

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

B= weight of filter, mg