A method and apparatus for measuring the boundary layer potential of particles and macromolecules into liquid polar media

摘要

Apparatus for measuring the boundary layer potential of particles and macromolecules into liquid polar media in the form of individual samples, with the following features:a) a sample container (5) with the sample to be investigated has on its upper side, a, which can be sealed, and can be easily removable from the sample container, the cover lid in the form of an insertable hollow metal cylinder (4) on,b) of the metal cylinder (4) has in its interior a, in the metal cylinder (4), which is guided essentially cylindrical compression (3), which in the middle in its longitudinal axis of a capillary tube (11) is pierced, wherein the capillary tube (11) into the vicinity of the bottom of the sample container, the compression (3) in its lower region by means of transverse struts of the metal cylinder (4) is spaced apart, and the compression (3) flush with the metal cylinder (4) which closes off,c) of the compression (3) has, in the upper region in the middle of its longitudinal axis a, the insertion end in it, collecting channel tube (2) in the form of a hollow metal cylinder with a collecting channel (1) on which, at its lower end a cross-sectional constriction up to the diameter of the capillary tube (11) and at its upper end by means of the compression (3) projects beyond the,d) of the, the compression (3) and protruding part of the collecting channel tube (2) is formed by a cylindrical plastic cylinder (9), whereby this, has longitudinal bores, distributed along the circumference, in the direction of its longitudinal axis thereof, and wherein the plastic cylinder (9) has a length such that, on the one hand, on its inside diameter that is attached, metallic contact ring (7) on the collecting channel tube (2) rests, and on the other hand, the bottom of the cylinder made of (9) is flush with the metal cylinder (4), and wherein the contact ring (7) as a connection - opening (8) for a pump or a pressurizing type unit serves,e) of the plastic cylinder (9) is formed by a cylindrical metallic head ring (11) of the enclosed on the metal cylinder (4) rests, and flush with the upper surface of the cylinder made of (9) which closes off,f) of the contact ring (7) and the head (11) are used as reference electrodes for the determination of the boundary layer potential.