Application - Synchronizing EC and Spectrum
Cyclic voltammetry
and
Spectrum
Measurement
Trigger connection
The SEC2021 Spectrometer supports Trigger Mode for synchronized measurement with external device. It is a function to synchronize spectroscopic measurement and tie measurement with an external measurement.
| Pin No. | Signal | Definition | Function |
| 1 | Power | 5V Output | When connecting to the PC's USB port, this pin is connected to VBUS. Up to 100 mA current |
| 2 | No connection | ||
| 3 | No connection | ||
| 4 | Output | Shutter | Shutter ON/OFF |
| 5 | Output | D2_ON | D2 light source ON/OFF |
| 6 | Output | HAL_ON | Halogen light source ON/OFF |
| 7 | Input | Trigger-IN | TTL |
| 8 | GND | GND | Ground |
 Fig. 1 SEC2021 Spectrometer Port Pin number. |
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Measurement example using cuvette type spectroelectrochemical cell
UV-visible absorption spectrum and absorption change on electrode reaction can be obtained by using optically transparent electrode(OTE). Gold or Platinum mesh electrode was used as an OTE. Cyclic voltammetry and Absorbance of the 2 mM potassium ferricyanide, as the reference of the absorbance, performed in a SEC-C Thin Layer Quartz Glass Spectroelectrochemical cell are shown below.
| Electrochemistry | Spectrometry |
Fig. 1 Cyclic voltammetry for 2 mM potassium ferricyanide. |
Fig. 2 Absorption spectra of the electrolytic balance for 2 mM potassium ferricyanide electrolyzed at different potential. |
| Sample | |
| Test solution : 2 mM Potassium ferricyanide / 1 M KNO3 | |
| Measurement parameter | |
| Electrodes Working electrode: SEC-C Pt Gauze working electrode Reference electrode: RE-2BP Calomel Reference electrode Counter electrode: SEC-C Pt counter electrode Electrochemical parameters Technique: Cyclic voltammetry Initial E : +500 mV Final E : 0 mV Scan Rate (Volt) : 5 mV/S Sensitivity : 10-4 |
Setting Measurement: Spectrum Setting: Trigger (SW Level trigger) Time sequence: Sampling interval: 0.02 s Measurement time: 600 s |
Synchronized measurement
In this section connection of SEC2020 Spectrometer system with Potentiostat for a synchronized electrochemistry and spectrochemistry measurement is introduced and explained.
The spectrometer supports Trigger Mode for synchronized measurement with external device. Depending on the trigger mode, you can control acquisition of spectrometer data with external Input/Output signal. It makes possible to control the spectrometer measurement with external operation of the external devices.
As an example Interface 1010ETM (Gamry Instruments), Model 2325 Bi-Potentiostat (ALS Co., Ltd.) and Model 760D Bipotentiostat were used.
For detailed explanation, choose one of the potentiostat below:
