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What are the chemical tests on hydrogen and DM water? 

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Hydrogen 

a) Hydrogen purity in % (volume/volume). 

b) Relative humidity in % (30% is nominal). 

DM water 

a) PH of DM water (less than 6.5 is acidic and more than 7 is alkaline where oxygen is not forming). PH is also called IP (isotopic purity). 

b) Conductivity. 

c) Copper traces. 

d) Dissolved oxygen (to trace corrosion and 1.2% is more). 

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