G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 27/64 (2006.01) C01B 23/00 (2006.01) G01N 33/00 (2006.01)
Patent
CA 2427299
A method for carrying out nitrogen analysis by ionization mobility spectroscopy, at concentrations of few parts per billion (ppb) in argon is described. The method involves the addition of hydrogen in concentration of at least 5 ppb and lower than 100 parts per million (ppm) to the argon to be analysed; the hydrogen addition step is possibly preceded by a purification operation of the argon flow, so as to reduce the total concentration of impurities other than nitrogen under 1 ppb.
L'invention concerne un procédé pour effectuer l'analyse de l'azote par la spectroscopie par mobilité ionique, au niveau de concentrations de quelques parties par milliard dans l'argon. Ce procédé consiste à ajouter de l'hydrogène dans une concentration supérieure ou égale à 5 parties par milliard et inférieure à 100 parties par milliard à l'argon devant être analysé. L'étape d'addition d'hydrogène est si possible précédée d'une opération de purification de flux d'argon, de manière à réduire la concentration totale d'impuretés autres que l'azote à un niveau inférieur à 1 partie par milliard.
Bonucci Antonio
Pusterla Luca
Stimac Robert
Succi Marco
Gowling Lafleur Henderson Llp
Saes Getters S.p.a.
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