Using the spectroelectrochemical flow cell, it is possible to have a different optical path length changing the gasket. We offer, as an optional item, a silicon and Teflon gasket with a 100, 250 and 500 µm of the thickness. SEC-2F Spectroelectrochemical flow cell was designed to fit perfectly in the SEC2000 Spectrometer, and it eliminated the use of the optical fiber to connect the Spectrometer to the SEC-2F. Even for another brand of the spectrometer, you can connect the SEC-2F using the collimating lens and optical fiber.

Structure

Catalog No.	Description
012660	SEC-2F Spectroelectrochemical flow cell
Contensts		Quantity
-	SEC-2F flow cell block A	1 pc
-	SEC-2F flow cell block B	1 pc
-	SEC-2F flow cell base	1 pc
-	SEC-2F flow cell cover	1 pc
-	SEC-2F S500 Silicone Gasket	2 pcs
-	Stainless tube OD 1/16" (50 mm)	1 pc
-	Needle adaptor	1 pc
-	Fitting PEEK	2 pcs
-	Silicon tube (30 cm)	1 pc
-	Teflon tube (1 m)	1 pc

∗ collimating lens, optical fiber and reference electrode are not included in the kit.

Configuration example of electrochemical analyzer and spectroelectrochemical flow cell

For the system set-up, spectrometer (detector), light source, optical fiber, electrochemical analyzer, spectroelectrochemical flow cell, the liquid feed pump (or syringe), and the PC for data processing are required. ITO electrode or platinum, gold or carbon grid electrode could be used as a working electrode.

Set Up

SEC-2F General Setup
SEC-2F Connection of syringe pump
SEC-2F Demonstration guide

Working electrode for spectroelectrochemical flow cell

Grid type electrode and ITO electrode are using in the spectroelectrochemical flow cell.

Grid electrode or ITO electrode, it is setting in the side where the light is transmitted through it.
Light is irradiated to the working electrode, using the optical fiber connected to the light source.
The changes in the concentration of the reactants on the surface of electrode, as in a electrolysis reaction, will consequently change the spectrum transmission for the component.
The change of transmission light quantity can be detected by CCD array detector.
Schematic structure is shown below

The light transmittance was compared with ITO electrode and Grid electrode (Au, Pt and Carbon) on a quartz glass as a reference.

For ITO electrode the light cannot be transmitted easily in an ultraviolet range. The transmittance is about 10% at 280 nm of the wavelength. For wavelength above 400 nm the transmittance is above 80%.
Compared with the quartz glass, the light transmission for grid electrode is about 30%, however it could be used in an ultraviolet range.

Reference data:The light transmittance is 50 ∼55% for SEC-C Platinum mesh electrode.

Working electrode

Catalog No.	Description	Size
012655	SEC-2F Pt grid electrode for flow cell	8x27x1 mmt
012656	SEC-2F Au grid electrode for flow cell	8x27x1 mmt
012657	SEC-2F Carbon grid electrode for flow cell	8x27x1 mmt
013432	ITO11 electrode 8x27x1.1 mm (10 pcs)	8x27x1.1 mmt

Gasket

Catalog No.	Description	Size
012661	SEC-2F S500 Silicone Gasket, 4 pcs	500 μmt
012664	Junta de Teflon SEC-2F T500, 4 pcs	500 μmt
012665	SEC-2F Junta de Teflon T250, 4 pcs	250 μmt
012666	Junta de Teflon SEC-2F T100, 4 pcs	100 μmt

●Handling of the thinner gasket is complicated. When you use a thin gasket, please pay attention with the flow rate.

Reference electrode

Catalog No.	Description	Size
013488	RE-3VT Reference electrode screw type (Ag/AgCl)	dia. 10 mm, L: 52 mm
013489	RE-7VT Non Aqueous reference electrode screw type (Ag/Ag+)	dia. 10 mm, L: 52 mm

Fiber and Lens

Catalog No.	Description	Size
012667	SEC-2F 400 µm Optical Fiber	25 cm
012685	SEC-2F 400 µm Optical Fiber	2 m
012234	UV/VIS Collimating Lens, 200-2000 nm

●For the light source type, one piece for SEC2000-TH (SEC2000-VIS / NIR) and two pieces for SEC2000-DH (SEC2000-UV / VIS) are required.
●The connection to the fiber optic spectrometer other than SEC2000 is also possible, in this case two of each, optical fiber and collimating lens

Other related products

Catalog No.	Description
013345	Model2325 Bi-Potentiostat
013349	Model2325 Software

Comparison of the absorbance for different gasket thickness

Measurement of the absorbance for potassium ferrocyanide electrolysis was performed using 100, 250 and 500 µm thickness gasket.

At the left diagram, the characteristic absorption peak of the sample is enclosed at a red line. At the right diagram, the equilimbrium time for electrolysis is shown.

Application example

Electrolysis of Vitamin B12 derived complex.

The 250 µm gasket was used for the moritoring of the electrolysis spectrum of the vitamin B12 complex.

SEC-2F Spectroelectrochemical flow cell

Description