Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Chemical analysis
Reexamination Certificate
2005-05-17
2005-05-17
Wachsman, Hal (Department: 2857)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Chemical analysis
C702S023000, C702S032000, C250S282000, C250S283000
Reexamination Certificate
active
06895339
ABSTRACT:
A method is provided for measuring by ionization mobility spectrometry (IMS) relatively high concentrations of water in argon, hydrogen, nitrogen and/or helium, including the following steps: (a) introducing the gas to be analyzed into an IMS instrument with a counter-flow of pure gas; (b) obtaining a signal variable over time and proportional to the number of ions detected by an ion detector of the IMS instrument; (c) determining two time intervals (A, B) corresponding to the drift times in the IMS instrument of the H3O+and (H2O)2+ions; (d) obtaining the peaks of the signal in the two determined time intervals (A, B); and (e) calculating the water concentration in the gas to be analyzed according to the ratio between the intensity of the two peaks obtained in the signal.
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Bonucci Antonio
Pusterla Luca
Stimac Robert
Succi Marco
Akin Gump Strauss Hauer & Feld & LLP
Saes Getters S.p.A
Wachsman Hal
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