The measurement of reaction rates is critical in catalysis research. Some common techniques include: - Gas Chromatography (GC): Separates and analyzes components of a gas mixture to determine reaction rates. - High-Performance Liquid Chromatography (HPLC): Used for reactions in the liquid phase. - Mass Spectrometry (MS): Identifies and quantifies the reactants and products. - Spectrophotometry: Monitors changes in absorbance or emission to determine concentration changes over time.