Sample Preservation

Preservation of laboratory samples is crucial to maintain sample integrity and ensure accurate test results, especially when there may be delays between sample collection and analysis. Different types of samples may require specific preservation methods to prevent degradation or contamination. Here are some general guidelines for laboratory sample preservation:

1. Follow Guidelines: Follow specific guidelines provided by the laboratory or testing facility for sample preservation. These guidelines may vary depending on the type of sample and the specific tests being conducted.
2. Use Proper Containers: Use containers that are suitable for the type of sample being preserved. Ensure that containers are clean, sterile, and compatible with the preservation method.
3. Maintain Proper Temperature: Some samples may need to be stored at specific temperatures to prevent degradation. Use refrigeration, freezing, or ambient temperature storage as recommended for each type of sample.
4. Add Preservatives: Add appropriate preservatives to samples if necessary to maintain stability and prevent contamination. Common preservatives include buffer solutions, fixatives, and antimicrobial agents.
5. Minimize Exposure to Light: Protect samples from exposure to light, as some samples may be light-sensitive and prone to degradation. Store samples in opaque or light-resistant containers when needed.
6. Prevent Evaporation: Seal containers tightly to prevent evaporation of volatile components from the sample. Use caps or lids that provide a secure seal to maintain sample integrity.
7. Avoid Cross-Contamination: Take precautions to prevent cross-contamination between samples during preservation and storage. Use separate containers, equipment, and workspaces for different samples when necessary.
8. Label Samples Clearly: Clearly label each sample container with information such as patient identifiers, sample type, collection date and time, and any relevant clinical information. Proper labeling ensures accurate sample identification and traceability.
9. Monitor Storage Conditions: Regularly monitor storage conditions, including temperature and humidity, to ensure that samples are being preserved properly. Use temperature monitoring devices or data loggers as needed.
10. Document Preservation Process: Document the preservation process for each sample, including details of any preservatives used, storage conditions, and handling procedures. This documentation helps ensure sample integrity and traceability.