test spot must be rewet.
Do this by squeezing
remaining liquid in ampoule 3 onto the nerve agent test
Disregard small blue areas under the
plastic rim of the nerve agent spot.
Nerve spot may become difficult to
A faint blue color may appear in the
wet with solutions as the kit ages.
ABSENCE of blister agents (H and
Work solutions to spot carefully.
At low concentrations, a change in
lewisite tablet rub mark may be very
(4) High temperatures and high humidity
slight. Compare with a second rub
(tropic conditions). The color change for lewisite rub
mark before making judgment.
marks may be very slight. Compare with a second rub
mark before making judgment. A faint blue color may
appear in the ABSENCE of blister agents (H and HD).
Yellow and orange sometimes occur
on blood spot when no agent is
(5) Direct sunlight.
Keep the sampler-
present. Pink or blue color must be
detector away from heat and direct sunlight as much as
present for a positive test.
(6) Snow and rain. Protect from rain and
Any combination of colors, or
snow as much as possible by use of your body or any
"rainbow effect," which includes
pink or blue should be considered as
a positive blood agent test.
2-4. POST-OPERATIONAL PROCEDURES.
a. All used sampler-detectors may be discarded in
(3) High temperatures and low humidity
Under desert conditions, the
b. Further demilitarization/disposal procedures can
sampler-detector is operated the same as under normal
be found in DOD 4160.21 -M and 4160.21 -M-1.
conditions with one exception, approximately 5 minutes
c. The M256 training simulator should be stored in
after exposure of test spots has started, the nerve agent
a cool dry place if possible.