Detecting odors of toxic substances

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In summary, the conversation discusses the detection and prediction of odors of extremely toxic chemicals, specifically without analyzing them. It is mentioned that the nose is very sensitive to poisonous vapors and can detect low concentrations of certain gases. It is also noted that most lethal chemicals have pungent odors, with the exception of methane and carbon monoxide. The discussion also touches on the importance of considering the sensitivity of the nose when dealing with toxic chemicals.
  • #1
Garlic
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How are odors of extremely toxic chemicals be detected? If the chemical doesn't contain any of the common molecules with an odor, can we analyse how it would smells like?
And can we predict how a certain substance smells like? (without even analysing it)
How do we know, for example, that methyl isocyanate has a "sharp, pungent odor"?
 
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  • #2
Garlic said:
How do we know, for example, that methyl isocyanate has a "sharp, pungent odor"?

From the people who smelled it and lived long enough to report.

And I am deadly serious.
 
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  • #3
This is... unbelievable
 
  • #4
Take in mind that the nose is sometimes incredibly sensitive to smells. You would have to expose a person for several hours to smellable concentrations of methyl isocyanate for it to be lethal.
 
  • #5
The nose is very sensitive to poisonous vapors. For instance, the nose can detect c.c. 3 ppm of H2S gas. with the exception of methane and carbon monoxide, most lethal chemicals have pungent odors.
 

1. How do you detect odors of toxic substances?

The most common method for detecting odors of toxic substances is through the use of instruments and sensors, such as gas chromatography or mass spectrometry. These instruments can analyze the chemical composition of the air and identify any harmful substances present.

2. What are the most common toxic substances that can be detected by odor?

Some of the most common toxic substances that can be detected by odor include carbon monoxide, hydrogen sulfide, ammonia, and formaldehyde. These substances are often found in industrial or household settings and can pose serious health risks if inhaled.

3. Are there any health risks associated with detecting odors of toxic substances?

While detecting odors of toxic substances itself does not pose any health risks, being exposed to these substances can have serious health consequences. It is important for scientists and other professionals to take precautions when working with toxic substances and to properly handle and dispose of them.

4. How sensitive are instruments used to detect odors of toxic substances?

The sensitivity of instruments used to detect odors of toxic substances can vary depending on the specific instrument and the substance being detected. However, these instruments are designed to detect even trace amounts of harmful substances, making them highly sensitive and accurate.

5. Can animals be trained to detect odors of toxic substances?

Yes, some animals, such as dogs, can be trained to detect odors of toxic substances. These animals have a highly sensitive sense of smell and can be used in situations where instruments may not be practical or available. However, they are not a replacement for scientific instruments and are often used in conjunction with them.

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