Sn-Containing Oxide Coatings: Formation, Composition, Electroanalytical and Catalytic Properties

Sn-containing oxide coatings were prepared via plasma electrolytic oxidation (PEO) of Ti plate in the electrolytes with [SnII-EDTA]2- complex anions or SnO2 particles in the anode and anodic-cathodic modes. The coatings formed in electrolyte with SnO2 particles stabilized by SAS contain SnO2 and Sn0. In the electrolyte with [Sn-EDTA]2- complex anions, the SnO2-containing coatings were formed in the anodic mode while Sn0-containing ones were obtained in the anodic-cathodic mode. SnO2-containing structures formed in the electrolytes with [Sn-EDTA]2- anions are shown to be active in catalytic oxidation of CO into CO2 at temperatures above 350 °C. They can be the basis for the preparation of both carriers of catalytically active compounds and catalysts for redox reactions. Potentiometric tests showed that the Sn-containing PEO layers on titanium exhibit the most characteristic pH function for the metal oxide electrodes in the direct potentiometry and acid-base titration.

Clinical evaluation of Eastman Kodak's Ektachem 400 Analyzer.

We evaluated the performance of the Kodak Ektachem 400 Analyzer in a 16-week clinical trial. We assessed four potentiometric tests and nine colorimetric tests for precision and correlation with results obtained some other commonly used instruments (Technicon SMA II and C800 System, Du Pont aca II, and Baker CentrifiChem). The comparison was favorable for all tests except albumin, sodium, and carbon dioxide. The reagents are stable. Little refrigerator storage space is needed. The computer system and the modular component design of the Ektachem 400 Analyzer make operation, troubleshooting, and preventive maintenance relatively easy.