Home > Chemistry > Dilution Calculations

What is the threshold odor number (TON) for the follow- ing sample?

The first detectable odor occurred when the 20 mL sample was diluted to 200 mL (180 mL of odor-free water was added to the 20 mL sample)

Answer 1

Ellie Andrews

The TON is 10.

The dilution factor at which the odor is barely perceptible is known as the threshold odour number.

The formula for the dilution factor is

#color(blue)(bar(ul(|color(white)(a/a) "DF" = V_text(f)/V_text(i) color(white)(a/a)|)))" "#

where #V_text(f)# and #V_text(i)# are the final and initial volumes, respectively.

You have diluted 20 mL to 200 mL in the example.

∴ #"DF" = (200 color(red)(cancel(color(black)("mL"))))/(20 color(red)(cancel(color(black)("mL")))) = 10#

additionally

#"TON" =10#

By signing up, you agree to our Terms of Service and Privacy Policy

Answer 2

Natalie Anton

To determine the threshold odor number (TON) for a sample, laboratory testing is typically required. The TON represents the dilution factor at which the sample's odor becomes detectable by a trained panel of human assessors.

By signing up, you agree to our Terms of Service and Privacy Policy

Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.