By the YELI Technical Team · Updated August 2026 · 5 min read
We say this openly because it is true of our own industry: activated carbon attracts more than its share of middlemen, and some of them are outright frauds. A buyer in Accra or Khartoum sends a deposit to a "factory" that turns out to be an office with a website — it happens more often than it should. The good news is that a real factory is easy to verify if you know what to ask for. Here is the checklist we hand to our own customers, in the order we recommend doing it.
1. Check the Address Is a Factory, Not a Showroom
Any supplier can print a factory address. The question is whether that address exists, whether it opens in navigation, and whether it is an industrial site or a rented office. Put the address into Google Maps and look at the street view. Ask for photos taken from inside the workshop — the activation line, the screening room, the packing area — not brochure shots. Our own plant is at No. 52 Yanling West Road, Yanshi Town, Xinluo District, Longyan City, Fujian Province, China, and we are happy for any buyer to verify it this way, or to visit in person.
2. Demand a Live Video Tour
A photo can be borrowed. A live video tour cannot. Ask the supplier to walk you through the production line on a video call, in real time: where the raw material is stored, where the kilns are, how screening works, where the bags are filled. If the answer is "the factory is too busy" or "we can send you a video later", treat that as a warning. We do live tours regularly — usually the buyer just wants to see the carbon coming off the line and the stock ready for loading.
3. Get a COA — and Test It Yourself
Every reputable supplier ships with a Certificate of Analysis: iodine value, hardness, moisture, ash, particle size. But a COA is only as good as the lab that issued it. Ask for the COA of the exact batch you are buying, and if the numbers matter to you, test a sample in an independent lab. For gold recovery carbon, the key parameters are iodine 1000–1300 mg/g, hardness 95% or better and moisture under 5% — any grade quoted far outside that range needs a good explanation.
4. Order Small Before You Order Big
The single most reliable test is a small trial order: one 25 kg bag, maybe a pallet. A real manufacturer will sell you a small quantity at cost, because they know a good test leads to a container order. A middleman or a scammer is usually not interested — small orders are too much trouble, and they cannot risk you testing their carbon against the spec. Sample value is normally credited against your first bulk order, so the trial costs you freight and little else.
5. Use Third-Party Inspection for Your First Container
For your first container, pay for pre-shipment inspection: SGS, Bureau Veritas, Intertek or similar, checking quantity and packing and taking a sample for analysis before loading. It costs a few hundred dollars and removes most of the remaining risk. Watch one thing closely: the inspection should sample the actual loaded cargo, because "sample switching" — showing good carbon and shipping something else — is the oldest trick in this trade. That is also why we encourage a live video tour of the packing line during loading.
Buying Gold Recovery Carbon? Start Small.
Start with a trial bag at cost price and verify us the same way you would verify anyone. We reply to inquiries within 24 hours.
Request a Trial Quote →The Bottom Line
Verifying a supplier is not about trust — it is about process. Address, live tour, independent testing, a small trial, third-party inspection: do those five steps in order and the risk largely disappears. Any genuine factory will walk through them with you. If a supplier pushes back on the checklist, that is your answer.
Related reading: why coconut shell carbon dominates gold CIP/CIL plants, and coconut shell vs coal-based carbon for gold recovery. Full answers on grades, samples and shipping are on our supplier FAQ.