User Manual of CIC-D100 Ion Chromatograph
15
Integral and pulsed amperometric detection: integral and pulsed amperometric detection is to
apply a series of continuously changing potentials in one cycle and is repeated, so that the
electrode surface can be continuously regenerated.
Cyclic voltammetric amperometric detection: this method controls the potential to scan
repeatedly at different rates and with triangular waveform for one or more times over time,
resulting in redox reaction on the surface of the working electrode.
2.6 Suppressor
The suppressor can reduce the background conductance of eluent and improve the signal
value of ions to be tested, thus improving the testing capability of ion chromatograph. The
operation principle of suppressor is shown in Figure 2-4. After use, the residual inorganic salts in
the suppressor should be flushed with ultrapure water for 10 min(1mL/min). Then, the four
interfaces should be plugged with plugs. The suppressor should be sealed for preservation. Water
infiltration should be conducted every one to two weeks, otherwise the suppressor will have high
pressure inside or leak liquid.
Figure 2-4 Schematic diagram of the suppressor’s working principle
Anions in Samples
Cations in Samples
Working principle of the suppressor (Anion)
Pure water or liquid from the
detector
Cation exchange membrane
To detector
Liquid waste
电极
Electrode
Sample, eluent
Liquid waste
Electrode
Cation exchange membrane
