DEVICE FOR ELECTROCHEMICAL MEASUREMENTS

Abstract

The invention relates to a device for electrochemical measurements comprising an electrolytic fluid vessel characterized in that tire electrolytic fluid vessel (1) composes an electrolytic fluid chamber (5) having a lower opening (4) below which there is an essentially cylindrical portion (3) of the vessel with an essentially cylindrical closure (11), wherein the walls of the cylindrical portion (3) and the closure (11) are threaded in such a way that the closure can move in the cylindrical portion approaching the lower opening (4) and moving away from it, wherein the electrolytic fluid vessel has a side recess (6) for inserting between the closure (11) and the lower opening (4) the working electrode (12) with dimensions allowing the lower opening (4) to be closed with it.

Claims

1. Device for electrochemical measurements comprising an electrolytic fluid vessel, characterized in that the electrolytic fluid vessel (1) comprises an electrolytic fluid chamber (5) having a lower opening (4) below which there is an essentially cylindrical portion (3) of the vessel with an essentially cylindrical closure (11), wherein the walls of the cylindrical portion (3) and the closure (11) are threaded in such a way that the closure can move in the cylindrical portion approaching the lower opening (4) and moving away from it, wherein the electrolytic fluid vessel has a side recess (6) for inserting between the closure (11) and the lower opening (4) the working electrode (12) with dimensions allowing the lower opening (4) to be closed with it.

2. The device according to claim 1, characterized in that the clear opening of the side recess (6) communicates with the clear opening of the cylindrical portion (3).

3. The device according to claim 1, characterized in that the diameter B of the cylindrical portion (3) is equal to or greater than the diameter C of the lower opening (4).

4. The device according to claim 1, characterized in that the device has a gasket (15) to be placed between the working electrode (12) and the outlet of the lower opening (4).

5. The device according to claim 1, characterized in that it has a base (2) with a recess allowing to access the closure (11).

6. The device according to claim 1, characterized in that the closure (11) is provided with a closure handle (17) in the lower part or a pressure pin (18) for pressing the working electrode (12) in the upper part.

7. The device according to claim 1, characterized in that it comprises a counter electrode (7) in the form of a metal rod or metal sheet or the side surface of an inverted truncated cone.

8. The device according to claim 1, characterized in that it is equipped with a cover (9) to close the electrolytic fluid chamber (5).

9. The device according to claim 8, characterized in that a reference electrode (10) is mounted in the cover (9).

10. The device according to claim 9, characterized in that the reference electrode (10) is mounted in the cover (9) by means of an electrode holder (16) arranged in the cover (9).

11. The device according to claim 10, characterized in that a part of the electrode holder (16) has a threaded outer surface, wherein the thread on the electrode holder (16) matches the thread of the cover opening (19) in which the electrode holder (16) is located.

Description

[0017] The solution according to the invention is illustrated by an exemplary embodiment in the drawing, where the individual Figures show:

[0018] FIG. 1—cross-section of the device,

[0019] FIG. 2—cross-section of the vessel,

[0020] FIG. 3—top view of the cover,

[0021] FIG. 4—schematic view of the closure pressing the working electrode,

[0022] FIG. 5—view of the counter electrode in the form of a plate (e.g. platinum plate) connected to a cable (e.g. a platinum wire),

[0023] FIG. 6—view of a large-surface counter electrode in the form of the side surface of a cone with a projection allowing for connection with a crocodile clip.

[0024] The device for electrochemical measurements, in the embodiment shown in FIGS. 1 and 2, comprises a vessel 1 in the form of a body, inside which there is an irregular axial through-recess, which consists of a lower cylindrical portion at the base of the body of diameter A forming the base 2, passing upwardly into a cylindrical portion 3 of diameter B, then passing into a portion of diameter C, forming the lower opening 4 of the electrolytic fluid chamber 5 in the shape of an inverted truncated cone. The diameter A is greater than the diameter B, and the diameter B is greater than the diameter C. The lower opening 4 of radius C is provided with a circumferential gasket 15.

[0025] The walls of the cylindrical portion 3 of diameter B are threaded. At the height of the cylindrical portion 3 of diameter B a side recess 6 is located, the axis of which is parallel to the base of the body, and the clear opening of the side recess 6 communicates with the clear opening of the cylindrical portion 3 of diameter B.

[0026] Inside the electrolytic fluid chamber 5 a counter electrode 7 is installed with a slight play, in the form of a metal sheet shaped like the side surface of a truncated cone open at the top, as shown in FIG. 5, or shaped as a portion of the side surface of a truncated cone, as shown in FIG. 6. The counter electrode 7, at the upper edge, is provided with a tab 8 protruding beyond the upper contour of the body.

[0027] The clear opening of the electrolytic fluid chamber 5 is closed at the top with a cover 9 (FIG. 3) comprising a central cover opening 19, through which a reference electrode 10 is inserted into the vessel 1. The cover opening 19 is threaded, and a threaded electrode holder 16, in which the reference electrode 10 is mounted, is partially screwed into the cover opening 19. Further, the cover 9 of the vessel 1 comprises a cut-out matching the protrusion 8 of the counter electrode 7.

[0028] By contrast, at the bottom of the body, in the cylindrical portion of radius B, a cylindrical closure 11 threaded in the central part is screwed into the cylindrical portion 3 of diameter B (FIG. 4). On the upper surface of the closure 11 a flat working electrode 12 is placed horizontally, pressed with a pressure pin 18 (being a part of the closure 11) to the circumferential gasket 15 and closing tightly from the bottom the lower opening 4 of radius C. An electric cable 13 ended with a clamp 14, which is connected to the working electrode 12, is inserted into the interior of the body. The closure 11 is equipped with an ergonomic handle 17.