The Carl von Ossietzky University in Oldenburg, Germany, developed a method which markedly improved the quantitative determination of hydrogen. A so-called TPR is conducted by coupling a flame ionization detector (FID) to a methanizer. Adding a certain amount of carbon monoxide (CO) and an excess amount of hydrogen immediately upstream of the FID, CO will react with hydrogen to yield methane. Methane produces a FID signal which is proportional to the amount of hydrogen in the sample.
The method is innovative insofar as it sends ahead of the known method of flame ionization a reaction which makes hydrogen, otherwise undetectable by FID, quantitatively detectable as methane. The idea has been realized on a laboratory scale and has to be optimized for industrial processes.
ADVANTAGES AND APPLICATIONS
The developed method enables a continuous and quantitative detection of hydrogen. Compared to thermal conductivity detectors, this method has a 1000-times higher sensitivity. It is robust and can be easily integrated into existing procedures.
The main fields of application are in gas-chromatography (as a flame ionization detector) and in temperature-programmed reaction. Users of this technology are manufacturers of scientific instruments operating in the field of analytical technology and gas analytics.
Inverse TPR, flame ionization, analytics
DE 10 2010 028211 B4
Carl von Ossietzky University, Oldenburg, Germany