Method for determining ammonia and sensor therefor

Details Method for determining ammonia and sensor therefor Method for determining ammonia and sensor therefor

1980-05-22

1981-10-27

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

23230R, 204195P, 204195B, 422 68, 435 29, 435 37, 435182, 435288, 435817, C12Q 100, G01N 2730

Patent

active

042971730

ABSTRACT:
The concentration of ammonia in an aqueous liquid is determined by contacting a sample of the liquid with dissolved oxygen and with a microbial electrode comprising an oxygen-sensitive electrode, a porous membrane, and nitrifying bacteria confined or immobilised by the membrane which are in direct or close contact with the diaphragm of the electrode. The rate of oxygen consumption under otherwise uniform conditions is as precise a measure of concentration of ammonia as a conventional colorimetric method and distillation-titration method.

REFERENCES:
patent: 4216065 (1980-08-01), Rechnitz et al.
R. K. Kobos et al., Anal. Letters, vol. 10, No. 10, pp. 751-758, (1977).
Michael J. Pelczar, Jr. et al., "Microbiology", pp. 702-704, (1972).
Wolfgang K. Joklik et al., "Microbiology", 15th Edition, p. 58, (1972).
Isao Karube et al., Biotech. & Bioengineering, vol. 19, pp. 1535-1547, (1977).
Isao Karube et al., J. Ferment. Technol., vol. 55, No. 3, pp. 243-248, (1977).
G. A. Rechnitz et al., Analytica Chimica Acta., vol. 94, pp. 357-365, (1977).
K. Venkatsubramanian, "Immobilized Microbial Cells", Chapters 14 and 15, (1979).
R. K. Kobos et al., Anal. Chem., vol. 51, No. 8, pp. 1122-1125, (1979).

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