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 ...

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