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During this time, Werner Ingold acquired a profound knowledge on glass and its manufacturing that allowed him to produce more robust pH electrodes [7] that were suitable for laboratory and industrial applications. Werner Ingold was personally dedicated to the development and improvement of glasses for pH measurement until the sale of his company.
In 1992, the company was incorporated as Mettler Toledo, Inc. [8] In 1996–97, Mettler Toledo, Inc. was sold by Ciba-Geigy AG to the New York-based AEA Investors Inc., in preparation for a subsequent initial public offering. The initial public offering was completed and began trading on the New York Stock Exchange, under the ticker symbol NYSE ...
Beckman Model M pH Meter, 1937 [1] Beckman model 72 pH meter, 1960 781 pH/Ion Meter pH meter by Metrohm. A pH meter is a scientific instrument that measures the hydrogen-ion activity in water-based solutions, indicating its acidity or alkalinity expressed as pH. [2]
A silver chloride reference electrode (left) and glass pH electrode (right) Because of the ion-exchange nature of the glass membrane, it is possible for some other ions to concurrently interact with ion-exchange sites of the glass, and distort the linear dependence of the measured electrode potential on pH or other electrode functions. In some ...
Commercial reference electrodes consist of a glass or plastic tube electrode body. The electrode consists of a metallic silver wire (Ag (s)) coated with a thin layer of silver chloride (AgCl), either physically by dipping the wire in molten silver chloride, chemically by electroplating the wire in concentrated hydrochloric acid (HCl) [3] or electrochemically by oxidising the silver at an anode ...
An ion-selective electrode (ISE), also known as a specific ion electrode (SIE), is a simple membrane-based potentiometric device which measures the activity of ions in solution. [1] It is a transducer (or sensor) that converts the change in the concentration of a specific ion dissolved in a solution into an electrical potential. ISE is a type ...
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