The Source — the HYDROGENYX Journal
DPD vs ORP vs Methylene: 3 methods, 1 truth
Paul Fournier
— WEEKLY EDITION · FRIDAY MAY 29 —
ORP is marketing. Methylene is approximate. DPD measures.
ORP (redox potential): measures an electrical tendency of water, not the H₂ concentration. ORP variation can come from Cl₂, O₂, H₂S — not only H₂. Pure marketing.
Methylene blue: sensitive colorimetric indicator (turns transparent in the presence of H₂). Accurate to ±15-20%. Good for quick test, insufficient for validation.
DPD (N,N-diethyl-p-phenylenediamine): H₂-specific reagent coupled with a calibrated photometer. Accurate to ±5%. It's the method of peer-reviewed studies.
The DPD kit delivered with ELITE 9K costs €11 — it's the most important part of the product.
±5% DPD · ±15-20% Methylene · Marketing ORP
« If someone sells you an ORP measurement, they're selling you marketing. Science requires DPD. »
Paul Fournier · HYDROGENYX Founder
HYDROGENYX Flask
The hydrogen ritual, ready in 5 minutes.
Up to ~9,000 ppb of dissolved molecular hydrogen (manufacturer's data), verifiable at home with a DPD test. 400 ml, touch screen, wireless charging base included.
60-day money-back guarantee · 5-year cell warranty · 4× Klarna
The HYDROGENYX Flask is a water preparation device, not a medical device. It does not prevent, treat, or cure any disease.
To go further: the science of hydrogen · the comparison · the FAQ
