Page 5 - A Burning Question Fire Debris

Teacher’s
Notes
HESE notes are provided to assist in the
prepa ration and execution of the laboratory
Texperi ment. A solutions key for the pre-lab
and post-lab questions can be found on pages 11
and 12, respec tively.
SUPPLIES
First, inventory the supplies included in the lab kit.
Supplies have been provided for up to six groups of
students.
 Gasoline Spiked Carpet:
Reference Sample (3)
 Diesel Fuel Spiked Carpet: Reference
Sample (3)
 Fire Debris Evidence Sample (6)
 Set of Diesel Fuel Colorimetric Gas
Detection Tubes (1 box of 6)
 Set of Gasoline Colorimetric Gas
Detection Tubes (1 box of 6)
 Analysis Jars with Lids (6)
 Colorimetric Tube Seal (1 pack of 6 blocks)
 Colorimetric Tube Opener (6)
 Gasoline Refill Dispenser (1 bottle)
 Diesel Refill Dispenser (1 bottle)
OTHER SUPPLIES AND
EQUIPMENT REQUIRED
 Laboratory Gloves
 Safety Glasses/Goggles
 Heat Source (Hot Plate, Bunsen Burner
and Ring Stand, Etc.) (6)
LAB PREPARATION
The samples to be analyzed must be prepared
be fore performing the laboratory experiment. The
procedure for this preparation is as follows:
1. Remove the lid from a Diesel Fuel Spiked Carpet:
Reference Sample.
2. With the Diesel Refill Dispenser, place four drops
of liquid onto the carpet and immediate ly cap
the jar tightly to prevent the escape of ignitable
liquid vapors.
3. Repeat this process for the remaining two Die sel
Fuel Spiked Carpet: Reference Samples.
4. Repeat the above procedure for the three
Gasoline Spiked Carpet: Reference Samples
using the Gasoline Refill Dispenser.
THE MYSTERY OF LYLE AND LOUISE 5