To use the Exit Spot Test for powdered Nembutal, the steps are as follows:
1. Use a clean knife to separate out a small sample of the powder (see Fig 18.2).
2. Dissolve a small amount of powder in a few ml of distilled water. Saturate the absorbent tip of the dip-card, and proceed as above as per step 3 to read the results on the cassette.
Reading the Qualitative Test Results
Positive Result: ONE red line in the control region (C). NO line appears in the test region (T).
The absence of a test line indicates a positive result for Nembutal.
Negative Result: TWO lines appear. A red line in the control region (C), and a red or pink line in the test region (T).
Invalid Result: NO line appears in the control region (C).
