in Water and Waste Water Quality and Treatment recategorized by
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A $50$ $\text{mL}$ sample of industrial wastewater is taken into a silica crucible. The empty weight of the crucible is $54.352$ $\text{g}$. The crucible with the sample is dried in a hot air oven at $104\;^{\circ}C$ till a constant weight of $55.129$ $\text{g}$. Thereafter, the crucible with the dried sample is fired at $600\;^{\circ}C$ for $\text{1 h}$ in a muffle furnace, and the weight of the crucible along with residue is determined as $54.783$ $\text{g}$. The concentration of total volatile solids is _____________________

  1. $\text{15540 mg/L}$
  2. $\text{8620 mg/L}$
  3. $\text{6920 mg/L}$
  4. $\text{1700 mg/L}$
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