21. The original proposed refrigerant was a paramagnetic salt, such as cerium magnesium nitrate. 22. However they were unable to make the cerium , praseodymium, and terbium nickelates. 23. Cerium , a rare-earth element discovered in 1803, was named after Ceres.24. Cerium ( IV ) sulfate is used as a volumetric oxidising agent in quantitative analysis.25. Cerium is also an essential component of phosphors used in TV screens and fluorescent lamps.26. Workers exposed to cerium have experienced itching, sensitivity to heat, and skin lesions. 27. It is the cerium complex of acetylacetone. 28. They replaced the commonly used YSZ electrolyte with a CGO ( cerium gadolinium oxide ) electrolyte. 29. With chromium and uranium, it forms eutectic mixtures, and thorium is completely congener cerium . 30. Typical indicators of sensitivity are Rhodium levels, Cerium / Oxide ratios and DI water blanks.
