What style clamp holder is this?

Question

I cannot for the life of me find this style of clamp holder with beaker base:

I can find beaker bases on sites like Fisher Scientific/etc., and flimsy alligator clamp soldering stands on Mouser/etc., but not this specific alligator (or other wire holding) clamp with sliding connector, on solid rod, attached to a beaker base.

Does anyone know what those sliding clamp holders are called, or where I can get this as a kit? I use this for e-chem and love it but need more.

Edit, 15-Jan This is an older version of my actual setup, which I would typically have on top of a magnetic stirring plate:

I would then be taking 2 of the 3 probes and passing them through a number of other poured solutions. My current clamping setup is great because I can simply release the counter electrode and just move my working and reference to different baths; really, I just need more of what I already have. As these experiments are limited in scope and do not require it, I do not make provisions for salt bridges, nitrogen purging, hydrogen gas aeration, etc.

Answer 1

Cyclic voltammetry (CV) is often performed in an enclosed vessel with the purge gas (argon/nitrogen) constantly bubbling through to prevent the solution from aeration and unnecessary side processes, mainly oxidation by the atmospheric oxygen. You'd rarely see alligator clamps in any CV apparatus also because they are not suited for holding moderately thick round objects (such as electrodes) in place, they can damage the inlet and outlet piping (e.g. the one for the purge gas, or chemicals if one studies kinetics), plus they make the experiments less reproducible since the position of the electrodes is changed each time you change the beaker.

Typically a teflon lid with 4 (or more) holes is used, where all 3 electrodes and the purging line are adjusted in place with rubber rings or plugs so that they are all firmly attached to the lid. This is very convenient since you don't have to manually adjust the apparatus every time the solution needs to be changed. All that's required is take the lid off, rinse the vessel and electrodes, fill the new portion in and put the lid back in place.

Alternatively, one can use a 3-neck round bottom flask with the electrodes attached through the rubber stoppers in the side necks. The downside is problematic cleaning, so this setup is more appropriate for the continuous measurements when one doesn't have to switch solutions too often. This is the simplest setup; a more sophisticated one can as well look like this:

Image source

Either way, I would discourage from using alligator clips for CV. Even though they might work for simple measurements, in my opinion there are too many downsides.