| 摘要 |
PURPOSE:To make quantitative determination of nitrate nitrogen and nitrite nitrogen in test water simultaneously from a difference in absorptivity by making use of two kinds of UV rays of different wavelengths, one of which has the absorptivity different per unit concn. with respect to the nitrate nitrogen and nitrite nitrogen. CONSTITUTION:The absorbancies of the test water are respectively obtd. by the UV rays of the two wavelengths which are different in the absorptivity per unit concn. The concns. of the nitrate nitrogen and nitrite nitrogen in the test water are respectively easily calculated from the equations I and II, where ENOX-N.a and ENOX-N.b are respective by the absorbancies of NOx-N at the wavelengths (a), (b), eNO3-N.a and eNO3-N.b are respectively the absorbancies per unit concn. of NO2-N at the wavelengths (a), (b). NO3-N and NO2-N are respectively the concns. (mg/l) of the nitrate nitrogen and nitrite nitrogen.
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