REFERENCE ELECTRODE ASSEMBLY

摘要

A reference electrode assembly having a constrained-diffusion liquid junction between a liquid junction solution and a sample solution having separate flow paths is disclosed. The assembly consists of a flow cell having attached to it a constraint comprising a region of porous material permeable to water and salts, a remote reservoir for holding a liquid junction solution, a means for moving the liquid junction solution from the reservoir to the constraint, and a reference contact region. Such a reference electrode device i s useful in pH and/or ion selective electrode potentiometric sensors and is suitab le for use in a mini-integrated electrochemical analyzer.