Minimization of the acetate interference of calcium-selective carrier-PVC-membrane electrodes for process-controlled haemodialysis

Summary Up to now calcium-selective electrodes with carrier-PVC-membranes have shown a need for correction during their application in controlling the process at an artificial kidney, for the presence of acetate anions leads to immense differences of measurements because of the anion interference. On the basis of experimental research the membrane characteristics could be changed in such a way that there is no need to correct the measurements when the electrodes are used during bicarbonate haemodialyses with 2 mmol/1 acetate. This was achieved by optimizing the ratio of the concentration of synthetic, electrically neutral carrier and lipophilic anion and by using plasticizer effects. A special membrane was developed in the same way for an application in dialysis solutions with 35 mmol/l acetate.     

Eine Bemerkung zum Wilsonschen Satze

Ohne Zusammenfassung     

Die photochemische Anlagerung von Nitrosaminen an Inden

The 1-oximino-2-amino-indane derivatives IV-a and IV-b are formed by the photoaddition reaction of N-nitrosomorpholine and N-nitrosopiperidine with indene. Reduction with LiAlH₄ led to the corresponding amines V-a and V-b supposed to have trans-configuration. Substitution of secondary bases to the chlorine atom in the bis-nitrosochloride II produced compounds of type III which are isomers of IV. The constitution of II was confirmed by conversion to 2-amino-indane (VI).