In article
<rose.486.3056EFC4 at alf1.ngate.uni-regensburg.de>,
rose at alf1.ngate.uni-regensburg.de (Andreas Rose
t3077) wrote:
>I study the host-finding of a blood-sucking bug
(Reduviidae - Triatominae).
>I want to collect odors from the headspace of a
sleeping person and see
>whether these are attractive in a behavioral
test.
>>For the collection of the odors, I want to
construct a cold trap. I have a
>general idea of what I'll to do: lead the air
from the headspace first
>through a washbottle that is cooled using
ordinary ice. This will take out the
>humidity and hopefully leave some odors in the
air. Then I want to lead the
>air through a container that is even colder, or
maybe several containers. The
>whole process will take a whole night, that is
anything between 8 and 12 hours.
>>I have the following questions: Has anybody done
something similar? What
>cooling agents are best used for this (Dry ice
or mixtures of dry ice and
>alcohol or acetone - two possiblities I heard.
Liquid nitrogen?)?
<SNIP>
>Any input is welcome, either as a PM or asa
follow-up.
I understand that ticks, to name one sort of
parasitic insect, are attracted by the carbon
dioxide exhaled by sleeping or resting people.
The ticks climb up out of the ground and hop on
board when they enough CO2.
So a dry ice trap might not be very effective...
:)
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