Dr Bobs Cell Kit2 Click Photo to Enlarge

Dr. Bob's Cell™ for Small-Scale Electrochemistry

Dr. Bob's Cell is our smallest electrochemical cell kit, with operational volumes of 1-30 mL.  Enzyme and catalysis studies, development of electrochemical sensors, basic research into battery mechanisms, and determination of redox potentials of inorganic complexes represent a few of its many applications.  Designed for flexibility and convenience, this cell kit can hold any of Gamry’s available working electrodes.  It's available in both a non-jacketed model and a jacketed version for temperature control.

Overview

Dr. Bob's Cell utilizes a pear-shaped flask which permits handling low volumes (down to 1-2 mL*). It is equipped with 5 multi-purpose ports. In the normal cell configuration, these ports are used as follows:

  • One central Ace-Thred port for a Working Electrode (ordered separately)
  • One Ace-Thred port for a Luggin capillary/bridge tube for use with Gamry’s SCE, Ag/AgCl, and Hg/Hg2SO4 reference electrodes (electrodes ordered separately)
  • One Ace-Thred port for a glass frit isolated platinum wire counter electrode (a wire is supplied)
  • One 14/20 ground glass port for inert gas purging/blanketing (an adapter is supplied)
  • One 14/20 ground glass port usable for temperature sensing, reagent addition, gas venting, etc.

The Ace-Threds allow for vertical adjustment to accommodate a wide range of sample volumes. Because Dr. Bob’s Cell uses standard joints and fittings, you can easily customize it for specific applications. The Bubbler has one position for deaeration and another for blanketing. We include a 2 x 6 mm Teflon® magnetic spin bar with all kits. A jacketed model is available for temperature control. The non-jacketed model includes a stand.

Working Electrodes are available in Platinum, Carbon (Glassy or Fiber), and Gold. They may be obtained in either a macro version with a 3 mm diameter or as a microelectrode with a 10 micron diameter. The macro electrodes have a Kel-F body and all electrodes are tested prior to shipment by running a cyclic voltammogram on a ferricyanide sample.

*Note that for working in volumes below 5 mL some modifications may be necessary to the standard setup; e.g. removal of the counter bridge tube.

 

Dimensions

Working Volume: Between 1 mL and  30 mL
Size: Approximately 10 cm diameter by 30 cm high (including electrodes)

Working Electrode Port

Type: #7 Ace-Thred
Electrode Diameter: Supports 6.5 mm to 7.5 mm diameter electrode bodies
Electrode Length: For work with small volumes, length must be at least 11 cm
Macro Electrodes: glassy carbon, gold, and platinum (3 mm diameter)
Micro Electrodes: 10 μm gold and platinum electrodes and 11 μm carbon fiber

Reference Electrode Port

Type: #7 Ace-Thred  - includes a standard reference electrode bridge tube
Reference Electrode Diameter: 9-11.5 mm (when used with the bridge tube)
Bridge tube termination in electrolyte: Unfired Vycor® disk, 3.5 mm diameter

Counter Electrode Port

Type: #7 Ace-Thred  – comes equipped with fritted glass isolation tube
Counter electrode: 0.41 mm diameter platinum wire, approx 150 mm long

Gas Flow Port

Type: 14/20 - equipped with three way gas flow adapter (purge, blanket, vent)

Spare Port

Type: 14/20-  supplied with several polyethylene stoppers

Chemical Compatibility

Wetted Materials: Pyrex®, PTFE, unfired Vycor®, ACE FETFE, Platinum, Polyethylene
Non-Wetted Materials: Above, plus nylon

Cells