4. Trace and Pattern Evidence

Explosives Residue — Quiz

Test your understanding of explosives residue with 5 practice questions.

Practice Questions

Question 1

Which of the following best describes the primary purpose of a post-blast scene assessment?

Question 2

Which sampling method is most appropriate for collecting trace nitrocellulose residue from a blast scene?

Question 3

Which analytical technique is considered the gold standard for identifying organic explosive residues?

Question 4

In headspace sampling of ignitable liquids, which device is commonly used to concentrate vapor analytes onto a sorbent for later laboratory analysis?

Question 5

A vacuum-assisted headspace sampler draws air at a rate of $1.5\,\mathrm{L/min}$ for $4\,$minutes. What volume of headspace sample is collected?