Solid state arsenic probe for use in pyrometallurgical processes

Details Solid state arsenic probe for use in pyrometallurgical processes Solid state arsenic probe for use in pyrometallurgical processes

1987-05-19

1989-06-27

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

204421, 204427, 423602, G01N 2758, G01G 2802

Patent

active

048426989

ABSTRACT:
A potentiometric electrochemical sensor for detecting gaseous concentrations of arsenic oxides or arsenic-bearing species at elevated temperatures. The sensor is comprised of: an ionically conducting solid state membrane which may be made of silver zirconium arsenate, sodium beta-alumina or silver beta-alumina; a reference electrode which may be silver wire packed in silver powder; and a working electrode which may consist of a platinum mesh electrode or a silver wire exposed to the arsenic oxide-bearing gas. The probe is responsive to arsine [AsH.sub.3 ] concentrations in the range 5-1000 ppm in oxidizing gases, such as air, which have been raised to the temperature range 600.degree.-900.degree. C. The compound silver zirconium arsentate is also novel.

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