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If 20 ml of an odorous water sample is needed 180 ml of odour free distilled water to produce 200 ml of odour free mixture, then the threshold odour number (TON) is
  • a)
    10
  • b)
    9
  • c)
    1
  • d)
    0.9
Correct answer is option 'A'. Can you explain this answer?
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If 20 ml of an odorous water sample is needed 180 ml of odour free dis...
Where A = Sample volume
B = Volume of odour free distilled water
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If 20 ml of an odorous water sample is needed 180 ml of odour free dis...
Calculation of Threshold Odour Number (TON)

Given,
Volume of odorous water sample = 20 ml
Volume of odour-free distilled water added = 180 ml
Volume of odour-free mixture obtained = 200 ml

We can calculate the dilution factor as follows:
Dilution factor = Volume of odorous water sample / Volume of odour-free mixture obtained

Dilution factor = 20 ml / 200 ml = 0.1

We know that the threshold odour number (TON) is defined as the number of dilutions required to make the odour just detectable.

TON = 1 / Dilution factor

TON = 1 / 0.1 = 10

Therefore, the threshold odour number (TON) of the given odorous water sample is 10.

Answer: Option A (10)
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If 20 ml of an odorous water sample is needed 180 ml of odour free distilled water to produce 200 ml of odour free mixture, then the threshold odour number (TON) isa)10b)9c)1d)0.9Correct answer is option 'A'. Can you explain this answer?
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