Keeping a Peptide Inventory: Labels, Records and Traceability
Most laboratories keep good records of experiments and poor records of materials. When a result looks wrong, the material record is what lets you rule the compound in or out without repeating the series.
What to record on arrival
Three items cover most needs: the compound and quantity, the date received, and the published certificate that describes the batch.
What to record at reconstitution
An aliquot label should carry the compound, the concentration, the solvent and the reconstitution date. Solvent matters because a later user cannot infer it and it changes how the material behaves. Date matters because solution age — not vial age — is the variable that governs whether the material is still fit to use.
Entry count is worth tracking too. Each entry into a reconstituted vial risks contamination, concentrates the remainder through evaporation, and admits oxygen. See aliquoting reconstituted peptides.
What to record about storage
Note anything unusual: a fridge that failed, a vial left out overnight, a shipment that arrived warm. These are exactly the events that explain an anomalous result months later, and exactly the ones nobody remembers without a note.
Why it pays off
When an assay drifts across a series, the candidate explanations are biological, procedural or material. Without records the material explanation cannot be tested, so the series gets repeated. With records it can often be settled in minutes — solution age, entry count, or a storage excursion will either correlate with the drift or will not.
This is also what makes results transferable. A record that specifies the compound, the solvent, the concentration and the solution age is reproducible by someone else; one that says “peptide X at 10 µM” is not.
ExoLabz supplies compounds for laboratory research use only. Nothing on this page is medical advice or a suggestion of human or veterinary use. Certificates of analysis are published on this site.
