A conductivity detector providing high voltage isolation for electroseparations is described. It is based on an oscillator which is capacitively coupled to the measurement electrodes; the conductance between the electrodes determines the output frequency. The detector was evaluated using a small-volume (500 nl) conductivity cell (cell constant 5.1´10-3 m-1) cell which is described; it was then characterized using a factorial method and optimized

This paper presents the manufacturing of a device used for an accelerated testing for cathodic disbounding of pipeline coatings, device that observes and complies with the specifications of ASTM G8-96/USA standard and substantially reduces the testing period from 30 days to 30 hours (equivalent ratio of 1day/hour). The device manages to maintain constant the total electric charge past through the system, so that the final effect taken at the level

This paper describes experimental equations that relate the dispersion coefficient to the geometry and hydrodynamic parameters of a flow injection system. Data are presented as isodispersion curves (similar to isothermal, isobar or isochore representations). The results present a correlated overview, which makes theoretical evaluation of the dispersion coefficient simple. Geometric and operational parameters for a flow injection system can be established