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. Author manuscript; available in PMC: 2014 Jan 1.
Published in final edited form as: J Electroanal Chem (Lausanne). 2012 Oct 24;688:32–39. doi: 10.1016/j.jelechem.2012.09.038

Fig. 1.

Fig. 1

Illustration of the setup for preparation of NO stock solution in the Septum Port Gas Sampling Tube. A gas-washing bottle containing alkaline solution is placed between the gas tanks and the gas sampling tube. The whole system is flushed with N2 or Ar gas for 30 minutes to remove O2 from connecting tubing, the alkaline solution (NO-prewashing solution) in the bottle and the buffer solution in the gas sampling tube. Then the gas switch is turned from N2 or Ar gas to NO gas allowing NO gas to go through the alkaline solution in the gas-washing bottle and the buffer solution in the gas-sampling tube for about 15-30 minutes.