This work provided a review of three techniques—(1) spectrochemical, (2) electrochemical, and (3) spectroelectrochemical– for molten salt medias. A spectroelectrochemical system was designed by utilizing this information. Here, we designed a spectroelectrochemical cell (SEC) and calibrated temperature controllers, and performed initial tests to explore the system’s capability limit. There were several issues and a redesign of the cell was accomplished. The modification of the design allowed us to assemble, align the system with the light sources, and successfully transferred the setup inside a controlled environment. A preliminary run was executed to obtain transmission and absorption background of NaCl-CaCl2 salt at 600°C. It shows that the quartz cuvette has high transmittance effects across all wavelengths and there were lower transmittance effects at the lower wavelength in the molten salt media. Despite a successful initial run, the quartz vessel was mated to the inner cavity of the SEC body. Moreover, there was shearing in the patch cord which resulted in damage to the fiber optic cable, deterioration of the SEC, corrosion in the connection of the cell body, and fiber optic damage. The next generation of the SEC should attach a high temperature fiber optic patch cords without introducing internal mechanical stress to the patch cord body. In addition, MACOR should be used as the cell body materials to prevent corrosion of the surface and avoid the mating issue and a use of an adapter from a manufacturer that combines the free beam to a fiber optic cable should be incorporated in the future design.

1. Introduction
2. Review of the Analytical Methods
    2.1 Spectrochemical Techniques on MoltenSalts
    2.2 Electrochemical Techniques on MoltenSalts
    2.3 Spectroelectrochemical Techniques inMolten Salts
3. Design of SpectroelectrochemicalTechniques as a Means for Monitoringand Analyzing Molten Salt Systems
    3.1 Design of a SpectroelectrochemicalSystem
    3.2 Preliminary Test of SEC for ObtainingTransmission and Absorption Backgroundof NaCl-CaCl2 Salt
    3.3 Design Issues and Learning LessonsManifested Post Preliminary Salt Test
4. Conclusion
Acknowledgements
REFERENCES

• Dimitris Killinger(Virginia Commonwealth University, 401 W Main Street, Richmond, VA 23284, USA)
• Supathorn Phongikaroon(Virginia Commonwealth University, 401 W Main Street, Richmond, VA 23284, USA) Corresponding author