When a water product is defined by its deuterium concentration, the key question is not whether it looks pure—it is how its hydrogen-isotope composition was measured. Deuterium requires specialized isotope analysis; it cannot be verified with a pH meter, TDS meter or ordinary home water-quality test.
Mdrn-Life publishes laboratory documents for specific identified water samples. Those documents are evidence about the samples named in the reports; they are not presented as proof that every bottle or every production batch has received the same external testing.
The most common hydrogen isotope is ¹H (protium). Deuterium is ²H, a stable hydrogen isotope containing one proton and one neutron. An isotope analysis determines the relative abundance of these isotopes in a water sample.
Hydrogen-isotope measurements are often expressed as δ²H, sometimes written δD. The delta value describes how the isotope ratio in a sample differs from an internationally defined reference.
That reference is VSMOW—Vienna Standard Mean Ocean Water. The IAEA maintains VSMOW2 and related reference waters to provide metrological traceability for hydrogen- and oxygen-isotope measurements.
A strongly negative δ²H value means the sample is depleted in deuterium relative to the VSMOW reference. A δ²H value, however, is not automatically the same thing as a ppm result. If a laboratory reports δ²H only, Mdrn-Life shows that result as reported rather than inventing a consumer-facing ppm number.
PPM means parts per million. In the DDW category it provides a more intuitive way to describe deuterium concentration. Mdrn-Life's manufacturing specification is a 5 ppm production target.
That target and an individual laboratory result are different statements. The target describes the intended production specification. A laboratory report describes what was measured in the particular sample identified in that document.
The report should identify the submitted water sample, field ID or laboratory ID.
A qualified laboratory applies an isotope-analysis method appropriate to the sample and measurement range.
The laboratory may report δ²H relative to VSMOW and, in some reports, an associated ppm concentration.
Customers can compare the sample identity, method, date, result and stated uncertainty without relying only on a marketing badge.
CRDS is a laser-based optical spectroscopy technique used to measure isotope ratios. The Hydroisotop report published by Mdrn-Life identifies Cavity-Ring-Down Spectrometry (CRDS) and reports its result relative to VSMOW.
IRMS separates isotopic species by mass. USGS states that dual-inlet IRMS is its gold-standard technique for δ²H measurement of water. The published Mdrn-Life USGS result document itself lists the sample's preparation/analysis as hydrogen equilibration and reports δ²H relative to VSMOW.
Why this matters: the two published Mdrn-Life documents should not be marketed as a single “dual-lab IRMS” test. The useful questions are which sample was tested, which method the laboratory states, which reference scale was used and what result the laboratory actually reported.
| Laboratory | Identified sample | Method/reporting | Published result |
|---|---|---|---|
| Hydroisotop GmbH | Mdrn-Life DDW 0006 | CRDS, relative to VSMOW | −980.5‰ and 3.0 ppm |
| USGS Reston Stable Isotope Laboratory | Field ID 0004 · Lab ID W-191180 | Hydrogen equilibration; δ²H relative to VSMOW | −954.5‰ No ppm stated in the report |
What the named laboratories reported for the specific samples identified in their documents, including the stated method/reporting convention and measured isotope result.
That every bottle or every production batch was independently tested by both laboratories, or that an isotope measurement proves a medical or biological outcome.
Can you identify the sample, field ID, lab ID or report number?
Is the testing organization named and independently identifiable?
Does the document state how the hydrogen-isotope measurement was performed or reported?
Does the report specify δ²H/VSMOW, ppm, uncertainty or another reporting convention?
Can you inspect the laboratory document instead of relying only on a website badge or summary?
These are the original published documents for the specific identified samples discussed above. Each report should be read according to its own sample identity, method, reporting unit and stated uncertainty.
Produced to a 5 ppm deuterium target and available in premium glass or lightweight PET.