RE: Re: [aihaih-list] Non-combustion CO sources?

[Guest guest]

Very interesting - thanks Alice! FYI, it was acetylene

cross-interference by the way.

-

Klane, M.S.Ed., CIH, CHMM, CET

Klane's Education Information Training Hub, LLC (KEITH)

491 Norridgewock Rd.

Fairfield, ME 04937-3116

P: 207-453-KEITH (5348)

jonathan@...

www.trainerman.com

" Take a step in the right direction "

> years ago I encountered radiofrequency interferences with CO meter that used

electrochemical sensors. They could check the welding machines themselves and

any other electric sources.

>

> Re: [aihaih-list] Non-combustion CO sources?

>

>

> The most likely sources of the elevated CO readings in CO-free

> environments are alcohol and hydrogen, which cross-react with

> electrochemical CO detectors.

>

> While obviously not the source of the ambient CO detected in this

> case, the most important non-combustion source of CO from a medical

> perspective is the endogenous (human) catabolism of heme proteins

> (such as hemoglobin, myoglobin and all cytochromes) by heme

> oxygenase-1, -2 and -3 into CO, biliverdin and iron. These pathways

> are responsible for the CO that is continuously detectable in humans

> who have not recently inhaled CO or dichloromethane, aka methylene

> chloride, which is slowly metabolized to CO.

>

> Endogenous CO is usually measured in breath or blood but it is also in

> flatulence at levels 10x-100x that found in breath -- so suspect

> flatulence if your CO detector ever alarms in a bathroom!

>

> Endogenous CO production rises during daytime and falls at night. It

> also is chronically elevated in some diseases (diabetes) but only

> sometimes in others (asthamtics during attacks). It also is

> transiently increased by exposure to stressors of any kind, including

> both toxic stressors such as alcohol and oxygen and non-toxic

> stressors such as light, heat and sound.

>

[Guest guest]

Its always great to hear the solution to the problem. Thanks!

Re: [aihaih-list] Non-combustion CO sources?

>

>

> The most likely sources of the elevated CO readings in CO-free

> environments are alcohol and hydrogen, which cross-react with

> electrochemical CO detectors.

>

> While obviously not the source of the ambient CO detected in this

> case, the most important non-combustion source of CO from a medical

> perspective is the endogenous (human) catabolism of heme proteins

> (such as hemoglobin, myoglobin and all cytochromes) by heme

> oxygenase-1, -2 and -3 into CO, biliverdin and iron. These pathways

> are responsible for the CO that is continuously detectable in humans

> who have not recently inhaled CO or dichloromethane, aka methylene

> chloride, which is slowly metabolized to CO.

>

> Endogenous CO is usually measured in breath or blood but it is also in

> flatulence at levels 10x-100x that found in breath -- so suspect

> flatulence if your CO detector ever alarms in a bathroom!

>

> Endogenous CO production rises during daytime and falls at night. It

> also is chronically elevated in some diseases (diabetes) but only

> sometimes in others (asthamtics during attacks). It also is

> transiently increased by exposure to stressors of any kind, including

> both toxic stressors such as alcohol and oxygen and non-toxic

> stressors such as light, heat and sound.

>

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