i have found out the values of total solids and volatile solids according to standard method (APHA), total solids (%) is 4.331 and volatile solids (%) is 33.33. whereas in (mg/L) total solid is 45000mg/L and volatile solids is 15000 mg/L. Are these calculations correct?
Formulas used;
Total Solids (%)= [(wt of dried residue & dish- wt of dish)/ (wt of wet sample & dish- wt of a dish]*100
Volatile Solids (%)= [(wet of dried residue & dish- wt of residue and dish after ignition)/ (wet of dried residue & dish- wt of a dish)]*100
Formulas are correct. But second formula shows how many % of total solids are volatile. Sometimes people use other formula, which shows how many % of sample are volatile solids.
Volatile Solids (%)= [(wt of dried residue & dish- wt of residue and dish after ignition)/ (wt of wet sample & dish- wt of a dish)]*100
I have a question: How total solids (4.331 %) could be lower than volatile solids (33.33 %)?
best regards
Vit
SOLIDS ANALYSIS
https://www.michigan.gov/documents/deq/wrd-ot-solids-analyses_445285_7.ppt
various examples are presented
MUSHTAQ AHMAD: thanks for the link, but there is no answer to my question. Total solids cannot be lower than volatile solids anytime.
Best regards
Vit
Even if I saw slides 44 and 45, there is no answer to my question, unfortunatels.
Best regards
Vit
As per the formula, the VS calculated is the fraction of TS. So, 33.3 pc of the 4.33 pc TS. This one represent the dry fraction of the fresh substrate.
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