Chromoionophore II – High Purity for ISE | Selectoprobe

References

Lindner E, Rosatzin T, Jeney J, et al. The potentiometric pH response of chromoionophores used in optical sensors . J. Electroanal. Chem., 1993, 352(1-2): 309-312; DOI: 10.1016/0022-0728(93)80273-K.

Introduction

Recently, we reported the advantageous properties of some H+-selective electrodes based on a novel class in ionophores [1] which were mainly used as chromoionophores in optical sensors. The performances of solvent polymeric membranes containing three similar phenoxazine derivatives (ETH 2439, ETH5294 and ETH 5350, commercial products from Fluka AG, Buchs, Switzerland) were studied and compared with H+-selective glass electrodes and membranes with tridodecylamine (TDDA) as the ionophore.

References

Buzanovskii, V.A. Determination of Sodium in Blood. Ref. J. Chem. 8, 197–222 (2018). https://doi.org/10.1134/S2079978018020012

Abstract

Human blood is tested in clinical diagnostic laboratories for numerous indicators. One of these indicators is the concentration of sodium. The review presents a chronological development of methods for determining the concentration of sodium in plasma, serum, and whole blood, based on different analytical methods such as flame photometry, potentiometry, ion chromatography, spectrophotometry, gravimetry, and titrimetry. A brief overview of these methods and the results of comparative tests are given. Currently, potentiometric procedures for determining the concentration of sodium in plasma, serum, and whole blood are the most widespread in small, medium, and large clinical diagnostic laboratories. Flame photometric procedures often act as expert methods. Ion chromatography is mainly used in research organizations, while gravimetric and titrimetric procedures are rarely used at present.