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hnology Offer Amperometric Determina�on of Hydrogen Sulfide
in Gas Samples
Keywords: Amperometric, sensor, hydrogen sulfide, gaseous samples
Background
Field of technology: Gas industry, biogas production, gas quality control. Hydrogen
sulfide is a toxic compound that is present in natural and biogas, as well. Conventional
amperometric sensors are using liquid film containing supporting electrolyte (to improve
the film’s conductivity) when measuring H2S. Disadvantage of those sensors is that
humidity changes could lead to drying the film. Moreover the film could be saturated
with sulfur affecting calibrating parameters.
Challenge: Continuous measurement of H2S in natural gas or in biogas. All-solid-
state sensor. Short response time (1 minute)
Brief descrip�on
Having special cell design it is possible to measure amperometrically H2S in gas phase
without any electrolyte. Both graphite and a modified graphite microelectrodes could be
used. When applying low potential to the electrodes a current flow, proportional to the
H2S concentration, could be measured between the electrodes. The sulfur attached on
the surface could be simply removed by vibrating the working electrode.
Development status: In research phase. Sensors cell and design for the detection
of H2S are available. Approx. 12 month additional research is necessary to improve
the performance of the modified graphite electrodes and to reduce the detection limit.
Development of portable, built-in or hand-held read-out device is possible within 18
months.
IP Status: Know how. The disclosed method and technology
is fully owned by the University of Pécs.
We are seeking for: Collaboration, licensing
Technology Transfer Office
University of Pécs
Vasvári Pál u. 4.
H-7622 Pécs, HUNGARY
www.innova�on.pte.hu
phone: +36 72 50 15 00 / 12292
mobile: +36 30 28 87 076
e-mail: k�k@pte.hu
All Intellectual Property rights reserved by University of Pécs
in Gas Samples
Keywords: Amperometric, sensor, hydrogen sulfide, gaseous samples
Background
Field of technology: Gas industry, biogas production, gas quality control. Hydrogen
sulfide is a toxic compound that is present in natural and biogas, as well. Conventional
amperometric sensors are using liquid film containing supporting electrolyte (to improve
the film’s conductivity) when measuring H2S. Disadvantage of those sensors is that
humidity changes could lead to drying the film. Moreover the film could be saturated
with sulfur affecting calibrating parameters.
Challenge: Continuous measurement of H2S in natural gas or in biogas. All-solid-
state sensor. Short response time (1 minute)
Brief descrip�on
Having special cell design it is possible to measure amperometrically H2S in gas phase
without any electrolyte. Both graphite and a modified graphite microelectrodes could be
used. When applying low potential to the electrodes a current flow, proportional to the
H2S concentration, could be measured between the electrodes. The sulfur attached on
the surface could be simply removed by vibrating the working electrode.
Development status: In research phase. Sensors cell and design for the detection
of H2S are available. Approx. 12 month additional research is necessary to improve
the performance of the modified graphite electrodes and to reduce the detection limit.
Development of portable, built-in or hand-held read-out device is possible within 18
months.
IP Status: Know how. The disclosed method and technology
is fully owned by the University of Pécs.
We are seeking for: Collaboration, licensing
Technology Transfer Office
University of Pécs
Vasvári Pál u. 4.
H-7622 Pécs, HUNGARY
www.innova�on.pte.hu
phone: +36 72 50 15 00 / 12292
mobile: +36 30 28 87 076
e-mail: k�k@pte.hu
All Intellectual Property rights reserved by University of Pécs
