Sample preparation is the process of preparing a material for analysis or testing. This step is crucial in various fields, including chemistry, biology, and materials science, as it ensures that the sample accurately represents the material being studied. Techniques may include cutting, grinding, or dissolving the sample to achieve the desired size or form for analysis. Proper sample preparation helps eliminate contaminants and reduces variability, leading to more reliable results. It often involves methods such as filtration, centrifugation, or dilution to isolate specific components. By following standardized protocols, researchers can ensure consistency and accuracy in their findings.