SB 742-1
(6) Color of tube should remain unchanged
in the absence of agent vapor. A purple/blue color 10a(2) through 7-10a(4).
indicates the presence of H vapor when using NaOH
(3) Remove the detector tube from the bulb
solution or solution from the blue top bottle IAW
or tubing and add 1 or 2 drops of NaOH solution to
directions for use of the M18A2 kit. Refer to the
the banded end. Place the sampling tube against a
MSDS sodium hydroxide prior to preparation.
white background and observe the resulting color. In
b. Test for Lewisite vapor using single yellow cold weather, color development may be slow.
band or double yellow band tubes.
(4) Color of tube should remain unchanged
(1) Preparation of NaOH solution. In lieu of in the absence of Lewisite vapor.
A blue-
using solution from the blue top bottle supplied with green/yellow-green color indicates the presence of
the M18A2 kit, prepare an 8.5% solution of NaOH by Lewisite vapor using the single yellow band tube. A
dissolving 0.68 grams of NaOH in 8.0 ml of distilled red-brown color indicates the presence of Lewisite
water. Consult the MSDS for sodium hydroxide prior vapor when using the double yellow band tube.
to preparation.
7-15