Verfahren und Vorrichtung zur Bestimmung von Phosphorverbindungen und Stickstoffverbindungen in Wasser

摘要

Sample water is supplied to an oxidative decomposer(202), heated to 90 DEG C under presence of a photooxidation catalyst, and irradiated with ultraviolet radiation by a low pressure mercury lamp (226) 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.