Chapter 14, Problem 14.9YT

Interpretation Introduction

Interpretation:

How samples suspected to contain residue of fire accelerants are best collected and transported to a forensics lab for testing, using the internet as a source and details has to be provided.

Concept Introduction:

Laboratory recovery of flammable residues:

The easiest way to recover accelerant residues from fire scene debris to heat the air light container in which the sample is sent to the laboratory.

When the container is heated any volatile residue in the debris is driven off and trapped in the container’s enclosed airspace.

The vapour (or) headspace is than removed with a syringe.

When injected into the gas chromatograph it is separated into components and each peak is recovered on the chromatogram.

Forensics: The study of evidence discovered at a crime scene and used in court law.

Forensics sciences: This branch of scientific knowledge and methodology to the legal problems and criminal investigations. It is encompasses many different files of sciences (chemistry, biology, engineering, medicine and pathology).