The procedure for grab sampling in catalysis typically involves the following steps: 1. Selection of Sampling Point: Choose a location in the reactor or process stream where the sample will be taken. 2. Sample Collection: Use appropriate tools (e.g., syringes, pipettes, or sampling valves) to extract a representative sample of the material or fluid. 3. Sample Handling: Transfer the sample to a container, ensuring minimal exposure to air or contaminants. This step is critical to prevent any alterations in the sample composition. 4. Sample Analysis: Analyze the sample using techniques such as gas chromatography (GC), mass spectrometry (MS), or nuclear magnetic resonance (NMR) to determine its composition.
