The claimed invention is an apparatus and method for performing impedance spectroscopy with a handheld measuring device. Conformal analyte sensor circuits comprising a porous nanotextured substrate and a conductive material situated on the top surface of the solid substrate in a circuit design may be used alone or in combination with a handheld potentiometer. Also disclosed are methods of detecting and/or quantifying target analytes in a sample using a handheld measuring device.

Systems and methods to evaluate a formation by analyzing drill cuttings involve a multi-frequency dielectric coaxial probe to obtain a reflected voltage from a medium under test based on a reference voltage over a frequency range. The medium under test includes the drill cuttings. The system includes a processor to compute an effective permittivity of the drill cuttings over the frequency range based on a reflection coefficient, which is a ratio of the reflected voltage to the reference voltage over the frequency range, and to determine one or more parameters from the effective permittivity. The one or more parameters are used to make decisions about subsequent drilling in the formation.

Apparatus (200) for detecting corrosion of a coating (250) of an object (216), the apparatus comprising: an electrically conductive body (202) defining a cavity (204) for containing an electrolyte (206), the body (202) arranged to be, in use, in electrically conductive contact with the object (216) and arranged to isolate, in use, the electrolyte (206) from the object; and a first electrode (208) within the cavity (204), the first electrode (208) for electrical connection to a potentiostat (402) or to a galvanostat and arranged to be, in use, in electrical contact with the electrolyte (206) in the cavity (204); wherein the body (202) comprises a first part (222) and a second part (224), the second part (224) being slidably movable relative to the first part (222) between a retracted position and an extended position.

The present invention relates to a fatty liver and liver fibrosis evaluation system based on impedance. The fatty liver and liver fibrosis evaluation system based on impedance provided in one aspect of the present invention uses 3-dimensional liver microtissues so that the fatty liver formation and the stiffness changes resulted from liver fibrosis induced by a test drug can be analyzed with non-invasive and highly reproducible manner.

Materials for binding per- and polyfluoroalkyl substances (PFAS) are disclosed. A fluidic device comprising the materials for detection and quantification of PFAS in a sample is disclosed. The fluidic device may be configured for multiplexed analyses. Also disclosed are methods for sorbing and remediating PFAS in a sample. The sample may be groundwater containing, or suspected of containing, one or more PFAS.

A device for analysis of cells comprises: an active sensor area (104) presenting a surface for cell growth; a microelectrode array (102) comprising a plurality of pixels (110) in the active sensor area (104), wherein each pixel (110) comprises at least one electrode (120) at the surface, wherein each pixel (110) is configured to control the configuration of the pixel circuitry and set a measurement modality of the pixel; recording circuitry having a plurality of recording channels (130), wherein each pixel (110) is connected to a recording channel (130), wherein each recording channel (130) comprises a reconfigurable component (131), which is selectively controlled between being set to a first mode, in which the reconfigurable component (131) is configured to amplify a received pixel signal, and being set to a second mode, in which the reconfigurable component (131) is configured to selectively pass a frequency band of the received pixel signal.

The present invention relates to the electrochemical detection of an analyte by capacitance spectroscopy using a redox active polymer-coated electrode such as a polyaniline-coated electrode.

A method for determining a value indicative of the permittivity of a cell population in the context of impedance spectroscopy comprises the following steps: generating an excitation current through the cell population, which oscillates with an excitation frequency; measuring a voltage in the cell population between a first measuring electrode (12) and a second measuring electrode (14); sampling the excitation current, wherein first sampled values for the excitation current are generated; sampling the voltage between the first measuring electrode (12) and the second measuring electrode (14), wherein second sampled values for the voltage between the first measuring electrode and the second measuring electrode are generated; and determining the value indicative of the permittivity of the cell population on the basis of the first sampled values and the second sampled values.

The invention discloses an impedance spectrum in-situ measuring device for the dielectric constant of solid materials at high temperature and high pressure conditions. The device comprises a cube-shaped pyrophyllite, a cylindrical opening penetrates between one end face of the pyrophyllite and the other end face opposite to the end face; a heater formed by sleeving annular stainless steel sheets is arranged in the opening; a first plate-shaped platinum electrode and a second plate-shaped platinum electrode are arranged in the cavity of the innermost ring-shaped stainless steel sheet. The first plate-shaped platinum electrode is electrically connected with one end of the Solartron 1260 Impedance/Gainphase Analyzer through a first lead, and the second plate-shaped platinum electrode is electrically connected with the other end of the Solartron 1260 Impedance/Gainphase Analyzer through a second lead. Several layers of machinable alumina fillers are filled between the sample of the solid material to be measured and the innermost annular stainless steel sheet. The device also comprises a first cylindrical plug and a second cylindrical plug. The device can be considered as a useful tool in study on the properties of the dielectric constant of the solid material to be measured at high temperature and high pressure conditions.

A method for simulating alternating current from low power direct current and determining tissue impedance of a biological load.