Testing durian for Auramine O and cadmium
When durian is exported to China, test results for Auramine O and cadmium are a closely watched part of the documents. This article explains the concepts and how to organize testing by batch so buyers can follow along.
What the two parameters are
- Auramine O: a dye not permitted on food; detecting residue can lead to a consignment being held or returned.
- Cadmium: a heavy metal that must be controlled in produce; limits are set by the importing market's authorities.
Why testing matters
Test results are part of the evidence that goods meet food-safety requirements. A batch without valid results, or with results above the limit, is hard to clear and causes heavy losses, especially for fresh fruit.
Organizing testing by batch
- Agree the parameters, sampling method and testing body before sourcing.
- Prefer laboratories recognized by the importing market, as the current rules require.
- Take samples that represent each batch and record the matching batch code.
- Check the validity period of results against the export date.
- Keep the result in the batch file for cross-checking when needed.
Points when working with suppliers
- Do not use another batch's result in place of the batch being shipped.
- Cross-check sample name, batch code and sampling date on the result sheet.
- Clarify who bears the cost and who is responsible when a result fails.
Frequently asked questions
Does each batch need its own test result?
Generally results need to be tied to the exact batch. The sampling method and the scope of a batch are agreed between the buyer and the parties before each trip.
Related reading
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