Harvest & Post-Harvest
Retained Samples & Storage Stability Observation
Retained samples allow a lot to be re-examined after storage time has passed. A useful retained-sample program preserves identity, representative packaging, environmental history, and predefined observation intervals.
Key concepts
- Quality changes may emerge after initial packaging
- A retained sample should represent the packaged lot and storage condition
- Repeatedly opening one sample changes its storage history
- Stability observations can guide future packaging and storage decisions
What to measure or observe
- Retain clearly labeled representative samples
- Use defined inspection intervals
- Record package integrity, aroma, appearance, moisture indicators, and relevant test results
- Use separate packages when repeated opening would alter the sample
Common mistakes
- Keeping an unlabeled leftover as the retained sample
- Opening the same package repeatedly without noting it
- Changing storage conditions mid-study without documenting them
- Using retained samples only after a complaint rather than as planned evidence
Visuals this lesson still needs
- Retained-sample schedule
- Package opening bias diagram
- Stability observation record
- Lot-to-retain traceability