Ancient Tree Yellow Tea: Lab Test Reports
For rare teas, transparency matters even more—because customers are right to be curious and cautious. This page provides the laboratory test reports for Ancient Tree Yellow Tea, organised by batch so you can see how each shipment is documented.
Each batch listed here is commissioned by Tea Ducks and independently tested by Eurofins, including a screen for 600+ pesticide residues (and, where applicable, heavy metals). Reports are batch-specific and reflect the laboratory’s methods and reporting limits; where relevant, reported values can be compared with UK/EU Maximum Residue Limits (MRLs).
Ancient Tree Yellow Tea: Latest batch record
For customers with a pack to hand, you may check and confirm the batch code on the label. If you’re reviewing this tea in advance, we’ve included the latest batch record here, with the full batch history beneath for reference.
Current batch | Review date | Tested by | Test scope |
|---|---|---|---|
TD–YSG–01 | 05 December 2025 | Eurofins (commissioned by Tea Ducks) | 600+ pesticide residues (screening panel); heavy metals (where applicable) |
Ancient Tree Yellow Tea: Certificates of Analysis (COA)
The COA images below are published by batch for Ancient Tree Yellow Tea and show the laboratory’s reported results and reporting limits. Each report is batch-specific and reflects the laboratory’s methods for that test and panel. If anything in the images raises a question, please get in touch — we’ll gladly help you make sense of the report fields.
Guidance on reading the Certificate of Analysis (COA)
The COA shown on this page is batch-specific and applies to the same batch used for both Ancient Tree Yellow Tea and Ancient Tree Yellow Tea Cake. If you’d like to view the tea alongside its testing record, you can visit the product pages here: Ancient Tree Yellow Tea and Ancient Tree Yellow Tea Cake. The notes below explain the key terms you’ll see in the report images.
What does “ND” mean?
Not Detected (ND) means the substance was not detected above the laboratory’s stated LOQ for that test and panel.What are LOQ / LOD?
LOQ and LOD are the laboratory’s quantification and detection limits for the method used.What do the units mean (e.g., mg/kg)?
Units such as mg/kg show the concentration reported in the sample.
Ancient Tree Yellow Tea: Scope and limitations
We publish these Certificates of Analysis (COA) as part of our commitment to batch-level transparency. For accurate interpretation, please read each report within the scope of the laboratory’s stated panel, methods, and reporting limits.
Batch-specific: Each COA applies only to the batch code shown on this page.
Panel-based scope: The “600+ pesticide residues” refers to the laboratory’s screening panel commissioned for that batch (the exact scope is shown on the COA).
Methods and LOQ: Reported results reflect the laboratory’s test method and Limit of Quantification (LOQ) for that screen; “Not Detected” should be read in relation to the stated LOQ.
Regulatory context: Where applicable, reported values can be compared with UK/EU Maximum Residue Limits (MRLs) for context.
Support and next steps
If you have any questions about a batch code, a specific line on the COA, or any term shown on this page, please contact us — our sourcing team will be pleased to help clarify the report and confirm the relevant batch record. You can also return to Quality & Safety for a clear overview of how we approach sourcing and testing for every tea we share.
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Published by Tea Ducks Ltd · Page last updated: 08 February 2026