Chemical Identification Tools: Raman, FTIR, and Tubes
How field identification tools support hazmat teams without replacing sampling discipline, reference libraries, or lab confirmation.
Field Use
Chemical identification tools can narrow a mystery, confirm shipping papers, support product control, and guide protective actions. They do not make a hazardous sample harmless, and they do not remove the need for PPE, decon, chain of custody, or lab confirmation when required.
Raman, FTIR, colorimetric tubes, pH paper, test strips, and reference databases each have strengths and blind spots. Good programs buy the tool, the library, the training, the sampling procedure, and the quality-control process together.
In practice, most hazmat teams don't choose one tool over another — they run a layered approach, using a quick colorimetric tube or pH strip to narrow the hazard class before ever bringing out a Raman or FTIR device for confirmation.
The library behind the instrument matters as much as the hardware: a device with an outdated or narrow chemical library will confidently return a wrong or 'no match' result on a compound it was never trained to recognize.
Tool Comparison
On the Scene: A Layered ID Approach
- An unlabeled drum leaking a corrosive-smelling liquid is first screened with pH paper to confirm acid versus base, narrowing the hazard class before any instrument comes out of the case.
- A suspicious white powder incident uses a Raman device through the original packaging where possible, avoiding unnecessary sample handling, before any decision to open the container for FTIR analysis.
- A tanker placarded for an organic peroxide but with damaged paperwork has technicians cross-check colorimetric tube results against the shipping manifest and ERG guide before committing to a specific product-control plan.
Purchase Questions
- What sample states, containers, mixtures, and concentrations can the tool handle?
- How often are libraries updated, and can results be exported for documentation?
- What PPE, sampling, decon, and evidence procedures are required?
- How does the tool perform in sunlight, smoke, weather, cold, and with gloved hands?
- What training hours and recurring competency checks will the department fund?
Do Not
- Do not open unknown containers just to get a better reading unless a trained plan supports it.
- Do not treat a library match as lab confirmation when legal, medical, or cleanup decisions require stronger proof.
- Do not forget that mixtures, contamination, packaging, and fluorescence can mislead instruments.
- Do not separate the device purchase from sampling tools, PPE, decon, and documentation.
Official Sources
Official sources are linked for verification. This page is a firefighter training reference, not legal, medical, or product endorsement advice.