Every batch of amla extract (Phyllanthus emblica) that leaves our factory ships with a Certificate of Analysis. Buyers rarely ask what happens before that document is issued. That is the part which decides whether the numbers on it mean anything.
Testing starts before the material becomes a product. We take samples at three points:
A sample taken from one corner of a drum only tells you about that corner. We reduce the bulk sample by quartering and keep a retained sample of every released batch. If a question comes up six months later — from your QA team or from a customs laboratory — the reference sample is still here.
| Test item | What it tells you |
|---|---|
| Identity and appearance | whether the powder is the material it claims to be |
| Total tannins (as gallic acid) | the headline specification |
| Vitamin C, where specified | the heat-sensitive fraction, and the hardest number to hold |
| Moisture, ash | stability and behaviour in your filler system |
| Heavy metals (Pb, Cd, As, Hg) | market access, mainly EU and US |
| Microbiological count | legal release for supplement use |
| Residual solvents | depends on the extraction route |
| Pesticides | increasingly requested by EU buyers |
Instruments: HPLC, GC-HS and IR, run by our in-house QC laboratory.
This is the part buyers most often miss. "40% total tannins" means different things depending on how it was measured. A UV (colorimetric) result and an HPLC result for the same powder are not interchangeable — UV reads the whole tannin family, while HPLC reads specific marker compounds. Both figures can be correct and still sit ten points apart.
So our COA prints the method next to the result. If your specification was written against a UV figure and your incoming check uses HPLC, you will see a gap that has nothing to do with the material. Specify the method in the purchase order — it saves both sides a claim.
Our in-house QC laboratory is housed in an 800 m² research and teaching building run in cooperation with Northwest University, equipped for HPLC, GC-HS and IR. We also maintain an independent laboratory that can carry out third-party testing, so a sample can be routed to a lab of your choosing.
The production side behind it: a GMP-standard workshop of 9,000 m², a 100,000-grade purification workshop for packaging, and ten production lines plus the first fully automatic extraction line in Northwest China. For amla in particular, the counter-current ultrasonic extraction line, the reverse-osmosis water system and the nanofiltration and ceramic membrane equipment let us work at lower temperature — which matters if vitamin C sits in your specification, because it is heat-sensitive.
Every drum carries a batch number that traces back to the raw material lot, the process record and the retained sample. You can check our COA against your own incoming test, or commission a third-party laboratory to test a drawn sample. If the two results diverge, we would rather see your data than defend a certificate.
The facility is accredited to Organic, ISO 9001, HACCP, Kosher, Halal and SC, and our products reach more than 60 countries and regions.
We supply amla extract from 10:1 through 40% total tannins, and can adjust specification, particle size and packaging to your formulation. Samples are available for your own testing before you commit to a volume. Send your specification and target market to sales@kh-health.com and we will start by sharing the COA of a recent batch.
