Battery, industrial, and refractory graphite — every lot certified.
Single-source vein graphite from Sri Lankan mines. Each variant ships with a public screening certificate verifying purity, particle size, and electrochemical performance.
Material you can trust, lot by lot.
We don't ship graphite without proof. Every lot listed here has been screened under USO's cyclic-voltammetry protocol on calibrated devices — and the results are public.
Independently screened
Cyclic-voltammetry on every lot, on devices with traceable calibration IDs. No vendor self-attestation.
Lot-level traceability
Each variant links to a public certificate page — no login, no PDF round-trip. Buyers verify before they buy.
Vein-grade purity
Carbon purity from ≥99.95 % down to <85 % across six particle-size grades. Battery, industrial, and refractory specifications.
Four single-source vendors.
Each Pioneer vendor brings a different size and purity range. Click through to filter by Grade, Particle Size, and Purity.
Cyclic voltammetry, lot by lot.
Every lot is sampled at 5 g and run on a USO-PP-series potentiostat in 0.5 M H₂SO₄ against an Ag/AgCl reference. The trace is benchmarked against a known-good reference standard.
- Sample & mount 5 g sample pressed onto a glassy-carbon working electrode.
- Sweep at 50 mV/s Cyclic scan from –0.2 V to +1.0 V looking for the quinone/HQ couple.
- Score & classify Homogeneity, oxygen loading, defect density and reversibility scored 0–10.
- Publish certificate Result, scores, and trace go on a public page tied to the lot.