Method and apparatus for measuring the air content of water-solu

Chemistry: analytical and immunological testing – Measurement of electrical or magnetic property or thermal... – Of a liquid

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436124, 436125, 436151, G01N 2700

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active

050988484

ABSTRACT:
Air containing water-soluble oxidizing agents, usually predominantly hydrogen peroxide, is exposed in concurrent flow to water that may be acidified if the air contains interfering acidic reducing agents such as sulfur dioxide. After that exposure the gas is separated from the liquid and, if the stripping liquid has been acidified, it is then neutralized. The neutral stripping liquid containing the oxidizing agents is mixed and then reacted with an iodide solution in the presence of a catalyst, after which the reaction products are passed, as the cathode solution, through an electrochemical concentration cell which has an anode chamber filled with a concentrated iodide solution as an anode solution. The volume of air exposed to the stripping liquid is continuously measured and likewise, in the concentration cell, the iodine formed before the mixed solution enters the concentration cell is continuously measured, so that content of water-soluble oxidizing agents in the air can be continuously measured or monitored.

REFERENCES:
patent: 1375933 (1921-04-01), Rideal et al.
patent: 3871827 (1975-03-01), Seilee et al.
patent: 3880722 (1975-04-01), Beltzer
patent: 4145913 (1979-03-01), Brown et al.

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