I would like to know your opinion regarding the setup of a system for oxygen purging with nitrogen. Before ordering the necessary materials, I'd like to be sure if this setup is feasible or if it can be enhanced or even simplified, so any advice or new ideas are more than welcome.
To summarize, the experiment I'm going to perform is as follows:
-Oxidative weathering in solution of various sulfide minerals will be studied under different chemicals conditions. Some of the experiments must be performed in anoxic conditions, so all dissolved oxygen must be purged with nitrogen.
- It is necessary to control the temperature throughout the experiment (40-42 ºC). The duration of the experiments will be 72h (non-stop). Stirring is also required. My first question: is it advisable to use a hot stirring plate together with the use of a silicon bath (or other suitable heating bath oil)? Is there any safety recommendation on the use of conventional hot plates for a prolonged period?
- About the materials needed. As container, I've thought of using normal Erlenmeyer flasks (125 ml would be enough) but septum-sealed. The setup I have in mind is to use a small diameter Pasteur pipette inserted into a Tefzel tubing connected directly to the nitrogen tank. Then, just pass the pipette through the septum (nitrogen inlet). For the outlet and positive pressure, maybe I could use a needle tip (wide diameter). For better visualization, I include a very basic drawing with the assembly scheme I propose:
How can I perform these experiments in series? That is, three flasks with different solutions purging, being stirred inside heating baths at the same time, but using a single tank of nitrogen.
Any advice on the assembly? Should I use another type of glassware instead of an Erlenmeyer? Are there better alternatives instead of using a Tefzel tubing (connectors, nitrogen tank adapters…)?
Do not hesitate to give your opinion. Thank you in advance.