Skip to main content


Hitachi High-Tech in America

Note Number: UV120006

The water quality standard for nitrite ion is 10mg/L or less as nitrate nitrogen and nitrite nitrogen. When a calibration curve at the wavelength of 539 nm was generated by the computation mode for the quantitative analysis, the calibration curve with a good correlation coefficient of R2=1.000 was obtained over the range of 0–1mg/L.