What type of container is preferred for samples to be analyzed for oil and grease?

For samples intended for the analysis of oil and grease, glass containers are preferred due to their inert nature and impermeability. Glass does not react with oil and grease, ensuring that the sample remains uncontaminated and represents the actual substance being tested. This characteristic is critical because any reaction or adsorption of the analyte to the container can lead to inaccurate results.

Additionally, glass containers are stable and provide a sealed environment that prevents volatile compounds from evaporating, unlike some plastic containers which can absorb certain compounds or allow for potential leaching of materials. Therefore, using glass ensures the integrity of the oil and grease sample for reliable analytical outcomes.