How does mass spectrometry assist in fire investigations?

Mass spectrometry is a powerful analytical technique that significantly enhances fire investigations by providing detailed analysis of chemical compounds. Specifically, it helps to further analyze individual components that have been separated by gas chromatography.

In a fire investigation context, materials from the fire scene, such as residues or accelerants, can be complex mixtures. Gas chromatography initially separates these components based on their chemical properties, such as volatility. Once separated, mass spectrometry can identify and quantify the individual substances based on their mass-to-charge ratios. This information is crucial for determining the presence of flammable substances or accelerants that may have been used in arson cases.

The ability to identify specific compounds not only aids in understanding what materials were involved in the fire but can also link potential suspects to the scene, provide insight into the fire's origin, and contribute to the overall case analysis. Thus, mass spectrometry plays a vital role in confirming the nature and identity of substances found during fire investigations.