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Title: Humidity-resistant ambient-temperature solid-electrolyte amperometric sensing apparatus

Abstract

Apparatus and methods for detecting selected chemical compounds in air or other gas streams at room or ambient temperature includes a liquid-free humidity-resistant amperometric sensor comprising a sensing electrode and a counter and reference electrode separated by a solid electrolyte. The sensing electrode preferably contains a noble metal, such as Pt black. The electrolyte is water-free, non-hygroscopic, and substantially water-insoluble, and has a room temperature ionic conductivity [>=]10[sup [minus]4] (ohm-cm)[sup [minus]1], and preferably [>=]0.01 (ohm-cm)[sup [minus]1]. The conductivity may be due predominantly to Ag[sup +] ions, as in Ag[sub 2]WO[sub 4], or to F[sup [minus]] ions, as in Ce[sub 0.95]Ca[sub 0.05]F[sub 2.95]. Electrical contacts serve to connect the electrodes to potentiostating and detecting circuitry which controls the potential of the sensing electrode relative to the reference electrode, detects the signal generated by the sensor, and indicates the detected signal. 4 figs.

Inventors:
Issue Date:
OSTI Identifier:
7035337
Patent Number(s):
5322611 A
Application Number:
PPN: US 7-648649
Assignee:
PTO; EDB-94-103683
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Patent
Resource Relation:
Patent File Date: 31 Jan 1991
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 01 COAL, LIGNITE, AND PEAT; AIR POLLUTION MONITORS; DESIGN; POLLUTANTS; AMPEROMETRY; CALCIUM FLUORIDES; CERIUM FLUORIDES; GASES; OPERATION; PLATINUM; SILVER TUNGSTATES; SOLID ELECTROLYTES; US BUREAU OF MINES; ALKALINE EARTH METAL COMPOUNDS; CALCIUM COMPOUNDS; CALCIUM HALIDES; CERIUM COMPOUNDS; ELECTROLYTES; ELEMENTS; FLUIDS; FLUORIDES; FLUORINE COMPOUNDS; HALIDES; HALOGEN COMPOUNDS; MEASURING INSTRUMENTS; METALS; MONITORS; NATIONAL ORGANIZATIONS; PLATINUM METALS; RARE EARTH COMPOUNDS; SILVER COMPOUNDS; TITRATION; TRANSITION ELEMENT COMPOUNDS; TRANSITION ELEMENTS; TUNGSTATES; US DOI; US ORGANIZATIONS; 540120* - Environment, Atmospheric- Chemicals Monitoring & Transport- (1990-); 012033 - Coal, Lignite, & Peat- Underground Mining- Mine Environment- (1987-)

Citation Formats

Zaromb, S. Humidity-resistant ambient-temperature solid-electrolyte amperometric sensing apparatus. United States: N. p., 1994. Web.
Zaromb, S. Humidity-resistant ambient-temperature solid-electrolyte amperometric sensing apparatus. United States.
Zaromb, S. Tue . "Humidity-resistant ambient-temperature solid-electrolyte amperometric sensing apparatus". United States.
@article{osti_7035337,
title = {Humidity-resistant ambient-temperature solid-electrolyte amperometric sensing apparatus},
author = {Zaromb, S.},
abstractNote = {Apparatus and methods for detecting selected chemical compounds in air or other gas streams at room or ambient temperature includes a liquid-free humidity-resistant amperometric sensor comprising a sensing electrode and a counter and reference electrode separated by a solid electrolyte. The sensing electrode preferably contains a noble metal, such as Pt black. The electrolyte is water-free, non-hygroscopic, and substantially water-insoluble, and has a room temperature ionic conductivity [>=]10[sup [minus]4] (ohm-cm)[sup [minus]1], and preferably [>=]0.01 (ohm-cm)[sup [minus]1]. The conductivity may be due predominantly to Ag[sup +] ions, as in Ag[sub 2]WO[sub 4], or to F[sup [minus]] ions, as in Ce[sub 0.95]Ca[sub 0.05]F[sub 2.95]. Electrical contacts serve to connect the electrodes to potentiostating and detecting circuitry which controls the potential of the sensing electrode relative to the reference electrode, detects the signal generated by the sensor, and indicates the detected signal. 4 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {6}
}