Question

A filterable residue analysis is run on a sample of water as follows. Prior to filtering, the
crucible and filter pad are kept overnight in the drying oven, cooled, and the dry mass (tare
mass) of the pair determined to be 54.352 grams. Two hundred and fifty milliliters of the
sample is drawn through a filter pad contained in the porous-bottom crucible. The crucible
and filter pad are then placed in a drying oven at 104 °C and dried until a constant mass of
54.389 grams is reached.

(I) Determine the suspended solids concentration of the sample,
(ii) If the crucible, filter pad, and solids are placed in a furnace at 600 °C for one
hour. After cooling, the mass is determined to be 54.367 grams, then determine
the volatile (organic suspended solids).

Answer 1