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Smell Threshold?

  • 14-10-2012 9:34pm
    #1
    ray giraffe
    Registered Users, Registered Users 2 Posts: 338 ✭✭


    At what minimum concentration (ppm) you can smell natural gas?

    I remember I could get a faint smell of gas indoors, but the gas detector machine from Bord Gáis couldn't pick up anything! Also it turned out I was right, because it did detect gas some minutes later.

    (I know you don't smell the methane, just the added odorant but I'm asking about the typical natural gas used at home.)


Comments

  • #2
    SOL
    Registered Users, Registered Users 2 Posts: 1,155 ✭✭✭SOL


    A quick google gives the wikipedia article:


    Even in well ventilated areas, extreme caution must be made when handling tert-butylthiol as it is a highly odorous chemical with an odor threshold of <0.33 ppb[12]. Extreme caution is not due to toxicity, but due to the significant odor and concerns that this odor would cause to the many individuals that might be exposed. The PEL for thiols of most types is 500 ppb, primarily due to reaction of nausea at levels of 2-3 ppm. The LC50 of tert-butylthiol is much, much higher.


    now you just need to look up it's concentration in natural gas and you'll have an answer...


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