摘要:
The present invention provides a method for the rapid monitoring of biological analytes in a point-of-care setting by providing a smart phone; providing a sample chamber; providing a sample; providing a dark box with a smartphone holder attached to the dark box top with the camera opening positioned about the aperture, adding a biological specimen suspected of containing a biological analyte in the sample chamber; adding a bis(2,4,6-trichlorophenyl) oxalate, an imidazole and a fluorophore to the sample chamber to react with the biological analyte; placing the sample chamber into the dark box; generating an emission from the fluorophore in response to the reaction with the biological analyte; and recording a set of time-lapse images of the emission with the smartphone.
摘要:
A method and system for measuring or assessing the homeostatic relationship between gases in the body, environment or water. The measured or assessed level of gases in the body, environment or air uses the interrelationships of the various components in order to establish guidelines for treating individuals, the environment or water.
摘要:
A sulfur breakthrough monitoring assembly for use in a fuel utilization system for detecting sulfur-containing compounds in desulfurized fuel, said monitoring assembly comprising: a heater for heating desulfurized fuel to a predetermined temperature, the predetermined temperature being between 450° C. and 600° C., a sulfur breakthrough detector adapted to receive heated fuel from the heater and including at least a reforming catalyst bed for reforming the heated fuel and a plurality of temperature sensors including a first temperature sensor for sensing temperature of the heated fuel before the fuel is conveyed through the reforming catalyst bed and a second temperature sensor for sensing temperature in the reforming catalyst bed, and a controller for determining whether concentration of the sulfur-containing compounds in the fuel exceeds a first predetermined concentration based on temperature outputs from the first and second temperature sensors.
摘要:
A method for preparing carbon allotrope based sulfide detectors comprising first functionalizing a carbon allotrope, such as a single-walled carbon nanotubes or graphene, with a solution of a polynuclear aromatic hydrocarbon-sulfonic acid, such as 1-pyrenesulfonic acid, followed by treatment with a metal, such as gold nanowires or cupric salt doped polyaniline, to give a metal-functionalized carbon allotrope, then drop casting the metal-functionalized carbon allotrope onto an inert surface, such as a silicon dioxide film on a silicon wafer having electrodes. Detection of sulfides may be by means such as photochemical or conductance methods. The hydrogen sulfide detectors may be used to detect and/or quantitate ppb and ppm levels of hydrogen sulfide in industrial settings or in detecting halitosis.
摘要:
A chemical sensor is provided on a first semiconductor die. A potentiostat is provided on a second semiconductor die. An analog to digital converter and a microcontroller are provided on a third semiconductor die. The first die is configured to be connected to the second die. The second die is configured to be connected to the third die. The chemical sensor detects a chemical in the surrounding environment and outputs a signal to the analog to digital converter. The analog to digital converter converts the signal to a digital signal and outputs the digital signal to the microcontroller. The microcontroller provides a measurement of the concentration of the chemical in the surrounding environment.
摘要:
An electrochemical sensor for measuring the amount of hydrogen sulphide or thiols in a fluid in a wellbore comprises a temperature- and pressure-resistant housing containing a flow path for the fluids. The fluids flow over one side of a gas permeable membrane made of zeolite or a suitable ceramic material, the other side of the membrane being exposed to a chamber containing a reaction solution which together with the hydrogen sulphide or thiols create a redox reaction resulting in an electrical current dependent upon the amount of hydrogen sulphide or thiols in the fluid.
摘要:
The present invention relates to the field of detection of components in gas phase, and in particular to detection of nitric oxide exhaled as a component of breath, using a liquid crystal assay format and a device utilizing liquid crystals as part of a reporting system.
摘要:
A hydrogen sulfide sensor is made from a metal acetate film, such as a thin film of copper acetate, formed on a set of monitoring electrodes, by evaporation of a metal acetate aqueous solution disposed on the electrodes, for detecting a weak gas, such as hydrogen sulfide, carried in a gas carrier, such as a nitrogen carrier, for detecting low concentration of the weak gas, such as ten ppm, when the conductivity of the film changes by several orders of magnitude, that produces a metal sulfide, such as copper sulfide, that is a good electrical conductor at room temperature, for example, as the metal acetate is converted directly to a metal sulfide upon exposure to hydrogen sulfide.
摘要:
An apparatus for measuring the reduced inorganic sulfur content of a sample. The apparatus has a reaction chamber (12) and means (14) for introducing a reducing agent that can selectively convert the reduced inorganic sulfur of a sample in the reaction chamber (12) to hydrogen sulfide. The reducing agent can be chromous chloride. The apparatus also includes means for measuring the amount of hydrogen sulfide evolved by reaction of the reducing agent with the sample and a detector for detecting when evolution of the hydrogen sulfide has reduced or ceased. The term “reduced inorganic sulfur” refers to sulfur in a form that can undergo oxidation and includes mineral sulphides and elemental sulfur.
摘要:
An electrochemical sensor for measuring the amount of hydrogen sulphide or thiols in a fluid in a wellbore comprises a temperature- and pressure-resistant housing containing a flow path for the fluids. The fluids flow over one side of a gas permeable membrane made of zeolite or a suitable ceramic material, the other side of the membrane being exposed to a chamber containing a reaction solution which together with the hydrogen sulphide or thiols create a redox reaction resulting in an electrical current dependent upon the amount of hydrogen sulphide or thiols in the fluid.