A Certificate of Analysis is useful only when the buyer can connect it to the correct product and transaction. Before an order, define what the document should identify and how inspection will be handled.
Product and batch identity
The document request should state the product name, grade or specification and the relevant batch or shipment reference. Avoid using a certificate for one product as evidence for another similarly named material.
Indicators and units
List the indicators that must appear and confirm the units and limit direction. A value such as “0.3” is incomplete unless the document explains the unit and whether it is a maximum, minimum or measured result.
Sampling and responsibility
Agree when and where sampling occurs, who performs it and whether an independent inspector is required. If the contract refers to a particular test or acceptance method, write that requirement into the order documentation.
Document timing
Confirm which documents are needed before shipment, with shipping documents or after loading. Include any destination-specific formatting request in the RFQ so it can be reviewed before commercial confirmation.
A clear inspection scope protects both buyer and supplier from assuming that “COA required” means the same procedure in every transaction.
Source register
- Zhonghao internal RFQ and document-confirmation workflow