B - Operations – Transporting – 01 – F
Patent
B - Operations, Transporting
01
F
48/1, 50/2
B01F 3/02 (2006.01) G01N 33/00 (2006.01) H01J 49/04 (2006.01) H01J 49/38 (2006.01)
Patent
CA 2003246
ABSTRACT OF THE DISCLOSURE The invention relates to a process for producing gas mixtures by a plurality of dilution steps of a high concentration standard gas with a high purity diluent gas. According to the invention, as soon as the high purity diluent gas is generated, no further contaminants such as gaseous impurities are added during the further mixing or diluting steps of the process. Only orifices or needle valves are used in the mixing or diluting lines while mass flow controllers and pressure regulators are placed upstream, at the output of the gas sources and/or downstream, i.e. in the gas venting lines. The invention particularly applies to trace analysis of gases with APIMS.
Kimura Takako
Mettes Jacques
Schack Michael
L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Proced Es Geo
Swabey Ogilvy Renault
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