منابع مشابه
Polymer membrane-based ion-, gas- and bio-selective potentiometric sensors.
Recent progress in the design of new polymer membrane-based potentiometric ion-, gas- and bio-selective electrodes in chemistry laboratories at the University of Michigan (Ann Arbor) is reviewed. Emphasis is placed on describing the performance of devices for measuring anions (e.g., salicylate, thiocyanate, chloride and heparin) and gases (e.g., ammonia, carbon dioxide and oxygen) in biological...
متن کاملPotentiometric sensors with ion-exchange Donnan exclusion membranes.
Potentiometric sensors that exhibit a non-Hofmeister selectivity sequence are normally designed by selective chemical recognition elements in the membrane. In other situations, when used as detectors in separation science, for example, membranes that respond equally to most ions are preferred. With so-called liquid membranes, a low selectivity is difficult to accomplish since these membranes ar...
متن کاملIonophore-based ion optodes without a reference ion: electrogenerated chemiluminescence for potentiometric sensors.
We report here on an electrogenerated chemiluminescence (ECL) readout for potentiometric ion-sensors, thereby offering an optical sensor output without the need for a reference ion (typically the hydrogen ion) that inconveniences ionophore based optical sensor principles. The compartment for ECL generation is physically separated from the sample by a bridge, and no current flows through the sam...
متن کاملModern Directions for Potentiometric Sensors.
This paper gives an overview of the newest developments of polymeric membrane ion-selective electrodes. A short essence of the underlying theory is given, emphasizing how the electromotive force may be used to assess binding constants of the ionophore, and how the selectivity and detection limit are related to the underlying membrane processes. The recent developments in lowering the detection ...
متن کاملScreen Printed Potentiometric Chloride Sensors
Potentiometric chloride sensors were fabricated by electrochemically chloridizing the surface of screen printed silver electrodes using amperostatic coulometry or asymmetric square wave voltammetry. In the case of coulometric chloridization, the effect of different chloride ion sources was also investigated. The response to chloride ions by each type of sensor was determined by measuring their ...
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ژورنال
عنوان ژورنال: TrAC Trends in Analytical Chemistry
سال: 2019
ISSN: 0165-9936
DOI: 10.1016/j.trac.2018.11.024