Method for producing CO2, N2 and/or SO2 for quantitative analysis from a sample
AssigneeThermo Fisher Scientific (Bremen) GmbH
InventorMichael Krummen
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Abstract
The invention relates to a device for producing CO2, N2 and/or SO2 from a sample for a quantitative analysis of the sample, comprising a reactor structure and metals acting in an oxidizing manner or metal oxides in the reactor. According to the invention, the reactor structure has at least two zones through which the sample can flow, which is to say a first zone with reactor metal and reservoir metal, or only reactor metal, and following the first zone, a second zone with reactor metal and reservoir metal, or only reservoir metal, wherein both metals can form oxides, and wherein the ratio of the reactor metal to the reservoir metal in the first zone is greater than in the second zone.
Claims13
A method for forming at least one of CO2, N2 and/or SO2 from a sample contained in a gas stream for quantitative analysis, the method comprising:
- providing a reactor structure having a first and a second zone, the first zone having disposed therein one of reactor metal or a combination of reactor metal and reservoir metal, the second zone having disposed therein one of reservoir metal or a combination of reservoir metal and reactor metal, wherein the ratio of the surface areas of reactor metal to reservoir metal is higher in the first zone relative to the second zone;
- prior to performing quantitative analysis, oxidizing the reactor metal and the reservoir metal by flowing an oxygen-containing gas stream through the first and second zones;
- flowing the sample-containing gas stream through the first and second zones in succession to form at least one of CO2, N2 and/or SO2 by reaction of the sample, wherein the first zone is maintained at a higher temperature relative to the second zone and wherein at least one metal in the second zone is a continuous extension of at least one corresponding metal in the first zone;
- directing the gas stream from an exit of the second zone to an analyzer for measurement of at least one of CO2, N2 and/or SO2.
Dependencies are inferred from the claim text.