Method of and apparatus for analyzing nitrogen compound and phos

Details Method of and apparatus for analyzing nitrogen compound and phos Method of and apparatus for analyzing nitrogen compound and phos

1994-07-11

1996-10-22

Warden, Robert J.

Chemistry: analytical and immunological testing

Phosphorus containing

436106, 436110, 436114, 436164, 436171, G01N 2178

Patent

active

055676219

ABSTRACT:
Sample water is supplied to an oxidative decomposer, heated to 90.degree. C. under presence of a photooxidation catalyst, and irradiated with ultraviolet radiation by a low pressure mercury lamp while being supplied with air, to cause photooxidative decomposition reaction. After the reaction, nitric acid ions are measured with an absorption photometer at a wavelength of 220 nm. Then, a color developer is added to the sample water, and the colored solution is employed for measurement of phosphoric ions with the absorption photometer at a wavelength of 880 nm.

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