H2 Blue is used to test the presence of molecular hydrogen in water.
It is possible to determine the concentrations of parts per million (ppm) of H2 in 6 ml volumes of water with H2 Blue. However, doing so must be done very carefully and in many cases, results in a waste of the product. We recommend only using H2 Blue for testing the presence of molecular hydrogen in general.
H2 Blue is not a laboratory-grade solution and is not 100% reliable, as there are meters and electronic devices that cost hundreds to thousands of dollars to test the presence of molecular hydrogen and its concentrations properly. H2 Blue is a more cost-effective way of testing molecular hydrogen but should not be relied on to prove concentrations present in water.