Abstract: The present invention relates to an electroanalytical instrument for determining by amperometry (eg chronoamperometry) the presence or quantity (eg concentration) of an analyte in an aqueous sample, comprising a sealed housing, an elongate pivotal arm mounted on the sealed housing, wherein the elongate pivotal arm houses a potentiostat, and a pivotal forearm joined pivotally to the elongate pivotal arm, which is connectable to an electrochemical sensor. By flexing the pivotal forearm, the electrochemical sensor may be electrically connected to the potentiostat. By flexing the elongate pivotal arm, the electrochemical sensor is immersed in the aqueous sample in the sealed housing.
October 15, 2018
August 6, 2020
Simon Richard JOHNSTON, Kevin MCDERMOTT
Abstract: A electrochemical sensor comprising a mounting having screen printed array of electrodes located thereon, the array comprising a reference electrode, a counter electrode and a plurality of working electrodes, wherein the working electrodes are each overlaid with an insulating layer of insulating material, the insulating layer having an array of apertures, exposing a respective array of working regions of the working electrodes, and a method of making same by applying screen printing technic, and a method of using same for chlorine determination.
Abstract: A device (10) is disclosed for measuring the concentration of metal ions in solution, particularly lead in blood. The device comprises a mercury free electrode (16), which is separated from the test solution (21) by a layer of material (20) which permits passage therethrough of the ions to be measured. In preferred embodiments an insulating layer (18) having an array of photoablated holes (19) is disposed between the electrode and the ion-permeable layer (20). Also disclosed are methods for operating the device and measuring ion concentration using anodic stripping voltametry, and assay kits incorporating devices as described together with appropriate meters and circuitry.
October 15, 1996
Date of Patent:
September 29, 1998
Jerome Francis McAleer, Martin Robert Ackland, Elliot Verne Plotkin, Lucinda Cordeiro
Abstract: A device for treating water to reduce the concentration of cations or anions therein includes a water-tight container (4) of flexible material, designed to be able to lie substantially flat (FIG. 3) when empty and having an aperture (5) for the introduction of liquid, a strainer (7) extending across the aperture, and a closure (6) for the aperture, and a quantity of ion-exchange material (b 8) occupying a minor proportion of the available interior volume of the container. A soil extraction outfit and a soil testing outfit are described, which incorporate the water treatment device.