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1. EP1810014 - A SENSOR FOR MEASUREMENT OF HYDROGEN SULFIDE

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Office
European Patent Office
Application Number 05808453
Application Date 12.10.2005
Publication Number 1810014
Publication Date 25.07.2007
Publication Kind A1
IPC
G01N 27/404
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
27Investigating or analysing materials by the use of electric, electro-chemical, or magnetic means
26by investigating electrochemical variables; by using electrolysis or electrophoresis
403Cells and electrode assemblies
404Cells with anode, cathode and cell electrolyte on the same side of a permeable membrane which separates them from the sample fluid
CPC
G01N 27/4045
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
27Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
26by investigating electrochemical variables; by using electrolysis or electrophoresis
403Cells and electrode assemblies
404Cells with anode, cathode and cell electrolyte on the same side of a permeable membrane which separates them from the sample fluid ; , e.g. Clark-type oxygen sensors
4045for gases other than oxygen
G01N 33/0044
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
33Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
0004Gaseous mixtures, e.g. polluted air
0009General constructional details of gas analysers, e.g. portable test equipment
0027concerning the detector
0036Specially adapted to detect a particular component
0044for H2S, sulfides
Applicants WORLD PREC INSTR INC
Inventors ZHANG XUEJI
KRAUSE DAVID
Designated States
Priority Data 62184804 25.10.2004 US
Title
(DE) SENSOR ZUR MESSUNG VON SCHWEFELWASSERSTOFF
(EN) A SENSOR FOR MEASUREMENT OF HYDROGEN SULFIDE
(FR) CAPTEUR POUR MESURER DU SULFURE D'HYDROGENE
Abstract
(EN) An electrochemical sensor (10) for measurement of hydrogen sulfide is described. The electrochemical sensor (10) comprises an electrolyte; an electrolyte container comprising a hydrogen sulfide permeable membrane (14); a working electrode (16) and a reference electrode (22) both disposed in the electrolyte; and an instrument 38 capable of maintaining a fixed DC potential in the range of 0 mV to 1,000 mV between the working electrode (16) and the reference electrode (22). Also a method of detecting hydrogen sulfide in a sample is disclosed. The method comprises providing an electrochemical sensor (10); at least partially immersing the gas permeable membrane (14) in the sample (44); and detecting hydrogen sulfide in the sample (44). The detection may be qualitative or quantitative.
(FR) L'invention concerne un capteur électrochimique (10) destiné à mesurer du sulfure d'hydrogène. Ledit capteur électrochimique (10) comprend un électrolyte ; un récipient d'électrolyte comprenant une membrane (14) perméable au sulfure d'hydrogène ; une électrode de travail (16) et une électrode de référence (22), toutes deux disposées dans l'électrolyte ; et un instrument (38) capable de maintenir un potentiel de courant continu fixe compris entre 0 et 1000 mV, entre l'électrode de travail (16) et l'électrode référence (22). L'invention concerne également un procédé pour détecter le sulfure d'hydrogène dans un échantillon. Le procédé comprend l'utilisation d'un capteur électrochimique (10) ; l'immersion au moins partielle de la membrane perméable au gaz (14) dans l'échantillon (44) ; et la détection du sulfure d'hydrogène dans l'échantillon (44). La détection peut être qualitative ou quantitative.
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