Infrared spectrophotometry (IR) provides a broader spectral analysis compared to NDIR, identifying and quantifying gases based on their unique IR absorption profiles.
- Principle: Molecules absorb IR light at vibrational frequencies unique to their structure. A full-spectrum IR scan can resolve multiple gas components.
- EP Use Case: Identification and purity assessment of nitrous oxide, CO₂, and hydrocarbons such as methane or ethyl acetate.
- Advantages: High analytical precision, capable of multi-component analysis, often used for validation or confirmatory testing.
