Illustrated Guide to Home Forensic Science Experiments

Chapter 35. Lab IX-1 Presumptive Color Tests for Gunshot Residue

Equipment and Materials

You’ll need the following items to complete this lab session. (The standard kit for this book, available from http://www.thehomescientist.com, includes the items listed in the first group.)

Materials from Kit

• Goggles

• Bottle, sprayer

• Lead nitrate, 0.1% w/v

• Modified Griess reagent, part A

• Modified Griess reagent, part B

• Sodium nitrite, 1% w/v

Materials you Provide

• Gloves

• Acetone

• Camera (optional)

• Clothes iron

• Cotton swabs

• Firearm and ammunition (optional; see text)

• Measuring tape or yard/meter stick

• Paper (see Figure 35-2)

• Paper towels

• Pencil

• Permanent marker or grease pencil

• Plastic wrap

• Scanner and software (optional)

• Scissors

• Sodium rhodizonate and buffer (optional)

• Tape, masking ...