The Nitric Oxide (NO2-/NO3-), detection kit is a complete kit for the quantitative determination of nitrate and nitrite concentrations. Absorbance is read at 540-570 nm. Only 0.050 ml diluted sample needed per well saves precious sample. Sensitivity: (Nitrite) 0.222 µmole/L; (Nitrate) 0.625 µmole/L (range (Nitrite) 3.125 - 200 µmole/L; (Nitrate) 3.125 - 100 µmole/L). Applications: Colorimetric detection. Species Reactivity: Species independent. Contents: Microtiter plate, Nitrate Reductase, Nitrate Reductase Storage Buffer, NADH, Nitrate Standard, Nitrite Standard, Reaction buffer concentrate, Griess Reagent I, Griess Reagent II