Abstract
Two new air-gap sensors with different indicator electrodes for the determination of nitrogen oxides and nitrites are described. The linear range of the electrode functions E = f(−lg[NO 2]) and E = f(−lg[N aNO 2]) for the sensor on the base of a combined glass pH electrode was 5 × 10 −8–1 × 10 −3 M, and on the base of combined NO 3 −–ion-selective electrode it was 5 × 10 −6–1 × 10 −3 M. The calibration curve slopes were 58.5 mV in both cases. The designed sensors were used for nitrite determination in some environmental samples.
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