Example: A well-mixed 25 mL of raw wastewater is used for TS analyses. A well-mixed 50 mL of raw wastewater is used for suspended solids analy- ses. Weights (wt.)of evaporating dish with and without the sample either dried, evaporated, or ignited were determined to constant weight according to Standard Methods (APHA et al, 1998 . The laboratory results are
Tare wt. of evaporating dish = 42.4723 g
Wt. of dish plus residue after evaporation at $105^{\circ }C=42.4986g$
Wt. of dish plus residue after ignition at $550^{\circ }C=42.4863g$
Tare wt. of filter plus Gooch crucible =: 21.5308 g
Wt. of residue and filter plus crucible after drying at $105^{\circ }C=21.5447g$ Wt. of residue and filter plus crucible after ignition at $550^{\circ }C=21.5349g$
Compute the concentrations of total solids, volatile solids , fixed solids, total suspended solids, volatile suspended solids, and fixed suspended solids.