How precise and repeatable are the measurements?

Our measurements are highly repeatable across the full D₂O concentration range. For high-purity samples (>90 wt% D₂O), the typical precision is about ±0.4 wt% for a single measurement; in the mid-range (30–90 wt% D₂O), it is about ±1.1 wt%; and for low-purity samples (0–30 wt% D₂O), it is about ±3.1 wt%.