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Mass-Sweep 

The above spectrogram from our quadruple mass spectrometer reads in real time the purity of the hydrogen stream coming off the RET reactor during hydrogen production from water vapor decomposition.  Although we have estimated that the purity of hydrogen is >97%, a precise purity level is difficult to read since it is beyond the scope of accuracy of the mass spectrometer.  The level of background moisture [mass = 18] is about the same as the oxygen [mass = 32].