| | | These electrodes are similar to combined pH electrodes, in which the glass membrane has been replaced by a silver, platinum or gold ring or wire. 50 55, platinum, for PH 25 portable. The indicator element is platinum wire. Like all electrodes in this new range, it is low-maintenance, has a ceramic diaphragm, a plastic body, an ergonomic handle and an MP-5 connector. Applications: General measurement of redox potential. Limitations Solutions with colloids or solids in suspension. Samples containing sulphides, reducing sugars or other solutions which react with silver ions. | | 52 60, silver. The indicator element is a silver ring. It uses a special electrolyte: KN03 1 M, which prevents clogging ofthe diaphragm caused by AgCI precipitation. Applications: Argentometric titrations. 52 61, platinum. The indicator element is a platinum ring. Applications: Potential measurementsand redox titrations. Limitations Solutions with colloids or solids in suspension. Samples containing sulphides, reducing sugars or other substances which react with the silver ion. 52 63, gold. The indicator element is a gold ring. Applications: Measurements of potential and redox titrations in samples with chromo or iron ions, also in the determination of Chemicla Oxygen Demand (COD). Limitations Solutions with colloids or solids in suspension. Samples containing sulphides, reducing sugars or other substances which react with the silver ion. 52 62, platinum, for difficult samples. The indicator element is a platinum ring. With sleeve diaphragm and CRISOLYT electrolyte. Applications: measuring potential redox in viscous media, with solids in suspension, waste water, galvanizing baths, etc., and performing redox titrations. Limitations Temperatures above 60 °C. 52 69, gold, for difficult samples. The indicator element is a gold ring. With sleeve diaphragm and CRISOLYT electrolyte. Applications: Measuring potential and redoxtitrations in samples with chrome or iron ions. Limitations Temperatures above 60 °C. | | |