Automatic electrochemical ambient air monitor for chloride and c

Details Automatic electrochemical ambient air monitor for chloride and c Automatic electrochemical ambient air monitor for chloride and c

1975-07-08

1976-07-13

Tung, T.

Chemistry: electrical and wave energy

Processes and products

Vacuum arc discharge coating

324 30R, G01N 2746

Patent

active

039692094

ABSTRACT:
An electrochemical monitoring system has been provided for determining chloride and chlorine in air at levels of from about 10-1000 parts per billion. The chloride is determined by oxidation to chlorine followed by reduction to chloride in a closed system. Chlorine is determined by direct reduction at a platinum electrode in 6 M H.sub.2 SO.sub.4 electrolyte. A fully automated system is utilized to (1) acquire and store a value corresponding to electrolyte-containing impurities, (2) subtract this value from that obtained in the presence of air, (3) generate coulometrically a standard sample of chlorine mixed with air sample, and determine it as chlorine and/or chloride, and (4) calculate, display, and store for permanent record the ratio of the signal obtained from the air sample and that obtained with the standard.

REFERENCES:
patent: 2370871 (1945-03-01), Marks
patent: 2851654 (1958-09-01), Haddad
patent: 3208926 (1965-09-01), Eckfeldt
patent: 3413199 (1968-11-01), Morrow
patent: 3556950 (1971-01-01), Dahms
patent: 3713994 (1973-01-01), Shults
patent: 3715298 (1973-02-01), Goodson et al.
patent: 3761376 (1973-09-01), Barstow et al.
patent: 3761377 (1973-09-01), Mang

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