Detection of hydrogen peroxide or phosphate related compounds in test or clinical samples by using potentiometric sensors wherein the reference electrode and a hydrogen peroxide selective electrode are both connected by a polyelectrolyte positioned in-between. More particularly a potentiometric sensor device for the detection of chemical species in solution with a novel configuration is disclosed.

The present invention relates to a method for functionalising a cellulose support with metal nanoparticles comprising the steps of: depositing on the cellulose support a single aqueous solution containing the metal precursor in the form of acid or salt in a concentration from 1 to 6 mM; and placing the cellulose support at a temperature from 65° C. to 80° C. for a time from 10 to 40 minutes. The present invention also relates to a method for producing an electroanalytical sensor comprising said functionalised cellulose support with electrocatalytic and concentration properties of the metal marker at the working electrode and to a method for producing the electroanalytical sensor.

The present invention relates to the technical field of glucose detection, and in particular to an enzyme-free glucose sensor and a fabrication method and use thereof. In the present invention, Magnolia grandiflora L. leaves are used as a carbon-based catalyst, which serve as a base material to well disperse nickel atoms and improve the catalytic activity of a material. A prepared Ni@NSiC nano-molecular layer is used to modify a pretreated white glassy carbon electrode (GCE) to obtain a highly-active material-modified working electrode Ni@NSiC/GCE, and then glucose is detected through cyclic voltammetry (CV) and chronoamperometry (CA).

The present invention relates: to a novel transition metal complex having a C—N ligand, which can be used for various devices including an electrochemical sensor, to a device comprising same; and preferably, to an electrochemical sensor.

A method of using a graphite electrode to measure a concentration of glucose or methionine from a biological sample is described. A mechanical pencil lead may be used, as the graphite electrode, and the biological sample may come from a patient's serum. The glucose or methionine may produce a peak current response within a range of 0.4-0.8 V when the sample is subjected to linear scan voltammetry.

A device for detecting a substance in a solution, wherein the device comprises: a substrate comprising silicon; a first electrode for use as a working electrode in an electrochemical cell and coupled to the substrate; and Ohmic contacts coupled to the substrate and configured to pass a current through the substrate when connected to a power source.

A target molecule redox method includes: a first process of bringing a liquid containing a target molecule to a non-flowing state, and causing electron transfer between an electron carrier immobilized on an electrode connected to an external power supply outside the liquid and the target molecule to oxidize or reduce the target molecule; and a second process of bringing the liquid to a flowing state. The first process and the second process are sequentially repeated.

Electrochemical cells and methods for their production are provided. In particular, multi-well assay plates including multi-electrode wells are provided. The multi-electrode wells contain multiple electrodes that are electrically isolated from one another, permitting the various electrodes of the various wells to be addressed in any suitable combination.

Provided herein is a biosensor suitable for use in measuring membrane fluidity or membrane permeability. The biosensor is formed of a solid substrate having a lipid bilayer compatible surface and a multi-lamellar lipid membrane structure localized on the lipid bilayer compatible surface. The multi-lamellar lipid membrane structure can be derived from a biological cell further comprising one or more synthetic lipids. An electrode forming all or part of the lipid bilayer compatible surface may be used to detect disruptions in the lipid membrane structure and hemolytic activity in a test sample.

The present invention provides a method for accurately measuring a blood component despite uneven distribution of blood introduced into a capillary. The measurement method according to the present invention is characterized in that a plurality of electrode systems for measuring the hematocrit are provided in a capillary of a biosensor to measure the hematocrit at different positions in the capillary. By measuring the hematocrit at the plurality of positions in the capillary as described above, the hematocrit can be measured more accurately despite uneven distribution of blood introduced into the capillary.