Quality & testing
Used cooking oil sampling: a buyer’s checklist
Plan representative UCO sampling with lot identification, sealed retained samples, laboratory instructions and an agreed acceptance point.
Direct answer
A useful UCO sample must represent the identified lot and have a documented collection method and chain of custody. Agree the sampling location, responsible inspector, laboratory, seals and retained samples before relying on the analysis for cargo acceptance.
Identify what the sample represents
Define the tank, batch or shipment being offered and reconcile its identifier with the analysis report. A sample from an earlier delivery does not establish the quality of a new cargo. Record the time and place of sampling and whether any transfer or blending happened afterwards.
FOSFA publishes contractual sampling methods for oils and fats, including sample handling. Use the method agreed for the relevant contract, with a competent inspector deciding how to address the actual tank condition.
Protect the evidence trail
Specify who draws the sample, who witnesses it and who takes custody. Agree unique labels and tamper-evident seals. Instruct the laboratory on methods, reporting units and the lot identifier so that results remain connected to the physical material.
Retained samples support later investigation only if their identity and handling are reliable. Agree the number of retained sets, storage arrangements and retention period rather than assuming that the laboratory or supplier will keep them indefinitely.
Set the decision point before loading
Clarify whether the agreed acceptance evidence is generated at the loading point, receiving point or both. State who pays for inspection and additional tests. Handling a disputed result after discharge is harder if no representative sealed sample or agreed decision procedure exists.
- Lot and tank identifiers
- Sampling date, location and method
- Inspector appointment and custody record
- Seals, labels and retained sets
- Laboratory methods and acceptance point
Buyer questions
Is a supplier’s small sample enough?
Only if its representativeness and chain of custody are established for the lot under assessment. Otherwise arrange appropriate lot sampling.
Does inspection guarantee sustainability eligibility?
No. Physical inspection and quality testing do not replace origin evidence or the required sustainability documentation.
Sources and evidence
Primary references support the stated technical definitions. Procurement checklists are editorial guidance, not evidence of a specific lot, shipment or certification.
Confirm laboratory methods, commercial terms and applicable requirements with the buyer and qualified advisers before contracting. No guide establishes stock availability or company certification.
Continue your assessment
UCO quality: FFA, moisture, impurities and MIV
Read UCO quality parameters correctly: free fatty acids, moisture, insoluble impurities, MIV, methods and contractual acceptance.
UCO certificate of analysis vs technical data sheet
Understand COA and TDS documents for used cooking oil: measured lot results, indicative specifications, units and evidence gaps.
How to qualify a used cooking oil supplier
A practical UCO supplier due-diligence file: legal identity, origin, availability, quality evidence and logistics readiness.
Discuss a documented UCO requirement
Send the quantity, loading and destination places, intended use, quality limits and required documents. Our trading desk can assess the file.
Discuss a documented UCO requirement →