COMBINATION pH ELECTRODE EPS-3Li

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The EPS-3Li electrode is designed for pH measurements in liquids with water content below 5%. It may be used in petroleum products, extracts based on water and alcohol, vegetable oil and emultion paints provided that it is accurately cleaned immediately after measurement. The measurements in pure water are also possible.
The BNC-50 connector enables cooperation with majority of available pH meters.

Glass body, round-shaped membrane. The reference electrolyte is lithium chloride solution, refillable by the hole placed in the upper part of the glass body. In non-water environment, the standard electrolyte - water, potasium chloride solution – will not provide accurate measurements because of high diffusion potentials and high resistance between the non-water solution and the electrolyte.
The electrode is equipped with three external junctions. The reference half cell is separated by an internal electrolytical diaphragma, what creates the ionic barrier. It prevents the silver ions from diffusion to the reference half cell, what in turn limits the chance of clogging of the ceramic diaphragma and interferences caused by the sulfide and cyanide ions from the measured solution. It also limits the interference caused by the the reducing agents such as amines, buffers containing TRIS, sulfites, etc.
There are a few types of non-water solutions in which it is impossible to make stable measurement, however these are rarely occuring exceptions.