Toxic Gas
Toxic gases such as carbon monoxide (CO) or carbon dioxide
(CO2
) may be useful when many small birds or animals
must be killed. Keep in mind that, even at concentrations
of less than l percent, carbon monoxide is lethal and
represents a substantial human safety hazard because it is
highly toxic and difficult to detect. In concentrations exceeding
10 percent, carbon dioxide can be flammable and explosive.
Work with this gas, as with anesthetic gases, must be
conducted in an open area away from electrical equipment.
Carbon monoxide and carbon dioxide may be purchased
as compressed gases in cylinders. Dry ice can also be used
as a source of carbon dioxide. If dry ice is used, protect animals
from contact with it. Cages covered with plastic bags
(Fig. 5.3) or plastic garbage cans can be used as killing chambers,
but the cages must be vented to allow displacement of
air within the chamber by the toxic gas. Leave the animals in
the chamber until breathing and heartbeat have ceased.
Toxic GasToxic gases such as carbon monoxide (CO) or carbon dioxide(CO2) may be useful when many small birds or animalsmust be killed. Keep in mind that, even at concentrationsof less than l percent, carbon monoxide is lethal andrepresents a substantial human safety hazard because it ishighly toxic and difficult to detect. In concentrations exceeding10 percent, carbon dioxide can be flammable and explosive.Work with this gas, as with anesthetic gases, must beconducted in an open area away from electrical equipment.Carbon monoxide and carbon dioxide may be purchasedas compressed gases in cylinders. Dry ice can also be usedas a source of carbon dioxide. If dry ice is used, protect animalsfrom contact with it. Cages covered with plastic bags(Fig. 5.3) or plastic garbage cans can be used as killing chambers,but the cages must be vented to allow displacement ofair within the chamber by the toxic gas. Leave the animals inthe chamber until breathing and heartbeat have ceased.
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