Lesson 3/Learning Event 1
FIGURE 21. COLORS INDICATE THE PRESENCE
OF DIFFERENT CHEMICAL AGENTS.
Identify Chemical Agents. When the ABC-M18A2 Chemical Agent Detector Kit is used to make
tests, the tests should be performed in sequence. Certain tests are made based on the results of a
preceding test. Color changes which represent positive tests are described for each test procedure.
If there is no color change, or a color change other than that described in the test, the results are
considered negative. Test results are not affected by extremes of temperature. In temperatures
below 32 F. (0 C.), the plastic squeeze bottles and substrate dispenser are carried beneath the outer
garments to keep the liquid reagents from freezing. At temperatures between 32 F. and 55 F.,
colors may take up to five minutes to develop. At night, a flashlight or other white light is used to
observe the ticket and tube colors. A tube must be placed across the flashlight and observed from
Check Detector Tickets. Before the detector tickets are used, they must be checked to be sure they
are usable. The following procedures are used to perform the check.
The following procedure for checking detector tickets before use
may differ from the one given in the detector kit instruction cards.
Either procedure is correct; however, the procedure listed below is
the preferred method.
Step 1. Detach a plastic envelope containing a detector ticket from the belt of tickets.