What is the term for the minimum concentration of a chemical that can be detected by smell?

What is the term for the minimum concentration of a chemical that can be detected by smell?

• A. Odor threshold
• B. Exposure limit
• C. Permissible exposure limit
• D. Lethal concentration

Answer: (A)

This question hinges on the odor detection threshold—the smallest concentration of a chemical that a typical person can detect by smell. This term describes sensory detection, not health risks or lethality. It’s used in odor control and environmental monitoring to gauge nuisance odors, which is why it’s the best fit. In contrast, exposure limits and permissible exposure limits set concentrations to prevent adverse health effects, not to define when something can be smelled. Lethal concentration relates to toxicity and death, not olfactory detection. So the term for the minimum concentration detectable by smell is odor threshold.

This question hinges on the odor detection threshold—the smallest concentration of a chemical that a typical person can detect by smell. This term describes sensory detection, not health risks or lethality. It’s used in odor control and environmental monitoring to gauge nuisance odors, which is why it’s the best fit. In contrast, exposure limits and permissible exposure limits set concentrations to prevent adverse health effects, not to define when something can be smelled. Lethal concentration relates to toxicity and death, not olfactory detection. So the term for the minimum concentration detectable by smell is odor threshold.