简介:2.1 Solubilized nitrate is determined potentiometrically using a nitrate ion-selective
electrode (ISE) in conjunction with a double-junction reference electrode and a pH meter with an
expanded millivolt scale (mV), or 简介:2.1 Solubilized nitrate is determined potentiometrically using a nitrate ion-selective
electrode (ISE) in conjunction with a double-junction reference electrode and a pH meter with an
expanded millivolt scale (mV), or an ISE meter capable of being calibrated directly in terms of
nitrate concentration.
2.2 Standards and samples are mixed 50:1 (v/v) with an ionic strength adjustment
solution. Calibration is performed by analyzing a series of standards and plotting mV vs. nitratenitrogen
concentration on semilog paper, or by calibrating the ion meter directly in terms of nitrate
concentration.详细>