Method and device for determining the concentration of nitrite

Details Method and device for determining the concentration of nitrite Method and device for determining the concentration of nitrite

2006-02-13

2010-02-02

Griffin, Walter D (Department: 1797)

Chemistry: analytical and immunological testing

Nitrogen containing

Nitrite or nitrate

C436S106000, C436S043000, C422S063000, C422S068100

Reexamination Certificate

active

07655473

ABSTRACT:
A method for automatically determining the concentration of nitrite in a liquid sample includes:determination of the extinction of the liquid sample at a wavelength λ of 150-250 nm,addition of a nitrite reducing agent to the liquid sample,determination of the extinction of the reduced liquid sample at a wavelength λ of 150-250 nm, anddetermination of the nitrite concentration from the difference between the concentration values obtained from the extinctions of the non-reduced and the reduced liquid samples.

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Machine Translation of DE 199 02 396. Meuller et al., Process for measuring the nitrate content of drinking water uses a wavelength inducing an absorption maximum and an absorption minimum of the nitrate concentration curve.
Vogel J et al: “Nitrate determination in natural waters by spectral photometry with a miniaturized fiber-coupled flow cell”, Second European Workshop on Optical Fibre Sensors, Jun. 9-11, 2004, Santander, Spain, Bd. 5502, Nr. 1, 2004, Seiten 402-405.

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