| 摘要 |
<p>PROBLEM TO BE SOLVED: To make measurable a nitrogen compound, a phosphorus compound and an organic contaminant in a sample water by using one analyzer and to prevent the constitution of a flow passage from becoming complicated. SOLUTION: In this analyzer, the ports of a multiport valve 6 are changed over properly, and a syringe pump is driven properly. Thereby, a sample water in which a nitrogen compound is converted into nitric acid ions, a sample water in which a phosphorus compound is converted into phosphoric acid ions or a sample water to which an oxidation treatment is not executed in an oxidation reaction tank 14 is supplied to an absorbance measuring cell 16. When the phosphoric acid ions are detected, a coloring agent 10 and a coloring agent 12 are added to the sample water. The absorbance measuring cell 16 is irradiated with measuring light by a light source 22. By using an optical filter 24, a wavelength of 245 nm is selected from the transmitted light of the absorbance measuring cell 16 in the case of the measurement of an organic contaminant, a wavelength of 220 nm is selected in the case of the measurement of total nitrogen(TN) and a wavelength of 880 nm is selected in the case of the measurement of total phosphorus(TP) so as to be sent to a light detection part 26.</p> |
