Carboxylic acid amides which form lipophilic complexes with magnesium ions, method for preparation of the lipophilic magnesium complexes and ion selective components

摘要

Hexacarboxylic acid hexaamides are described which form lipophilic complexes with magnesium ions. These hexacarboxylic acid hexaamides can have an open-chain, or a monocyclic, bicyclic, tricyclic or polycyclic, total structure. The hexacarboxylic acid hexaamides are used as a magnesium-selective component in appropriate ion-selective parts of measuring arrangements for determining the magnesium concentration or activity respectively in liquid samples. Owing to the high selectivity for magnesium ions compared with sodium ions and the adequate selectivity for magnesium ions compared with calcium ions, the determination of the magnesium concentration in biological materials, for example body fluids such as urea, blood serum or whole blood, is possible using these membranes. In addition, determinations of this type can also be carried out in sample solutions which have a neutral or slightly acidic pH.