A buffer concentration of 60 mmol L−1 was selected because it represented a compromise considering the analytical signal, current counts, and analysis time. The separation of nitrate and nitrite obtained under the optimized conditions is shown in Fig. 1.
A bufferconcentration of 60 mmol L−1 was selected because itrepresented a compromise considering the analytical signal,current counts, and analysis time. The separation of nitrateand nitrite obtained under the optimized conditions isshown in Fig. 1.