INVESTIGATION OF SALICYLATE INTERFERENCE ON ANION SELECTIVE ELECTRODES^*

Abstract

Several types of ion-selective membranes were tested to decrease the salicylate interference in clinical measurements of chloride. The study included electrodes with methyldodecylammonium salt and membrane matrices of poly(vinyl chloride) (PVC), silicone rubber (SR) and cellulose triacetate (CTA). The first two membranes were modified by the ultra- filtration (UF) and nanofiltration (NF) membranes, respectively, the cellulose triacetate membrane was modified by alkaline hydrolysis. The most significant and useful decrease by one and half order of magnitude of log K_{Cl, Sal} ^pot was observed for the silicone rubber membrane with additional nanofilter membrane.

Dedicated to Prof. George Baiulescu on his 70th anniversary

Keywords:

• Chloride ion selective electrode
• Salicylate interference
• Asymetric membranes

ACKNOWLEDGMENT

This study was partially supported by the project KBN 3 T09A 053 14.

Notes

Dedicated to Prof. George Baiulescu on his 70th anniversary