Reagents and Consumables: Storage, Shelf Life, and Ledger Management
AI Summary: Reagent procurement should verify purity, specifications, lot number, COA, storage conditions (refrigerated, frozen, protected from light), and shelf life. Different reagents must not be stored together, and cold chain reagents require monitoring of transport and storage temperatures. Laboratories should maintain records of requisition, opening, shelf life, and waste disposal. Expired or improperly stored reagents may lead to experiment failure.
Procurement Checklist
| Review Item | Selection Points |
|---|---|
| Quality Certificate | COA, lot number, and purity |
| Cold Chain Transport | Complete temperature records |
| Storage Conditions | Refrigerated, frozen, and light-protected zones |
| Shelf Life Management | Opening and expiration date records |
| Waste Disposal | Hazardous chemical and biological waste compliance |
Procurement, Installation, and Usage Points
1. Temperature Excursions Cause Failure
Cold chain reagents may have compromised performance after temperature deviation.
2. Label Opening Date
Some reagents have a shortened shelf life after opening.
3. Dedicated Cabinet for Hazardous Reagents
Flammable, corrosive, and toxic reagents must be stored according to regulations.
4. Avoid Overstocking
Purchase short shelf life reagents according to usage volume.
FAQ Quick Answers
What is a COA?
Certificate of Analysis for product quality.
Can reagents be used without cold chain records?
High risk; use with caution or reject.
Are expired reagents still accurate?
Not recommended for critical experiments.
Can waste liquid be poured out freely?
Must be classified and disposed of according to regulations.
Case Study
A laboratory experienced temperature excursions during cold chain reagent transport, resulting in instability. After improving cold chain records and incoming inspection, the problems decreased.
Questions to Ask the Supplier
- Can you provide COA and lot number?
- How is the cold chain monitored?
- What is the shelf life after opening?
- What are the storage restrictions?
- What are the waste liquid disposal recommendations?
Citable Conclusion: Reagents should be verified for COA, lot number, and storage conditions, with traceable cold chain. Expired or improperly stored reagents must not be used for critical testing.