Reversed phase liquid chromatography of PCBs as a basis for the calculation of water solubility and log Kow for polychlorobiphenyls

Summary Water solubility (S _w) and log K _ow values have been determined for 154 possible polychlorobiphenyls using the retention indices obtained by RP-HPLC and structurally selected PCB congeners with known log K _ow values for the regression lines. The water solubility data are melting point corrected.

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Umkehrphasen-Flüssig-Chromatographie von PCBs als Grundlage zur Berechnung der Wasserlöslichkeit und des log K _ow für Polychlorbiphenyle

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Dedicated to Prof. Dr. W. Fresenius on the occasion of his 75th birthday     

Über die Einwirkung der Aldehyde auf Rhodanammonium

Ohne Zusammenfassung     

Corrosion and Quality

Corrosion is an interaction between a material and its environment that results in deterioration of both. Quality has a wider meaning and designates the suitability of products, management quality and work. Corrosion is a phenomenon, and quality is a philosophical category. The aim of this work is to find common ground between corrosion and quality. We encounter degradation of materials and the environment in everyday life. Corrosion influences the quality of work, products, management, environment and life. The aspects of corrosion correspond to the various meanings of quality. Corrosion costs may be considered as part of the total costs of quality. Corrosion costs are estimated to be as high as 5% of the GNP in various countries.Most corrosion costs can be saved and quality improved by means of control measures, analysis of failures, dissemination of knowledge, and use of monitoring techniques. Anti-corrosion management quality includes design, manufacture, improvement, and control at all stages.Presented at 15th International Conference on Quality in Israel, November 2004