Solid state arsenic probe for use in pyrometallurgical...

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

C - Chemistry, Metallurgy

01

G

23/232, 324/28

C01G 28/02 (2006.01) G01N 27/403 (2006.01) G01N 27/49 (2006.01)

Patent

CA 1276432

Abstract of the Disclosure 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 [AsH3] concentrations in the range 5-1000 ppm in oxidizing gases, such as air, which have been raised to the temperature range 600°-900°C. The compound silver zirconium arsentate is also novel.

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