The present invention improves the performance of an analyzer and facilitates the maintenance of the analyzer. This fluorescent body is produced by firing a raw material which contains: an alumina; and at least one among Fe, Cr, Bi, Tl, Ce, Tb, Eu, and Mn, wherein the raw material contains 6.1-15.9 wt % of sodium with respect to the total amount of the raw material.

A method and measurement system for calibrated measurement of at least one variable of a sample are based on an optical behaviour of at least one sensor substance which depends on the at least one variable. The at least one sensor substance is brought into contact with the sample. At least one calibration area, associated with the at least one sensor substance, is defined. At least one image is recorded which captures at least one of the at least one sensor substance and at least one of the at least one calibration area. The value of the at least one variable of the sample is derived from the at least one image, based on image data associated with the at least one of the at least one sensor substance and on image data associated with the at least one of the at least one calibration area.

Embodiments described herein may be useful in the detection of analytes. The systems and methods may allow for a relatively simple and rapid way for detecting analytes such as chemical and/or biological analytes and may be useful in numerous applications including sensing, food manufacturing, medical diagnostics, performance materials, dynamic lenses, water monitoring, environmental monitoring, detection of proteins, detection of DNA, among other applications. For example, the systems and methods described herein may be used for determining the presence of a contaminant such as bacteria (e.g., detecting pathogenic bacteria in food and water samples which helps to prevent widespread infection, illness, and even death). Advantageously, the systems and methods described herein may not have the drawbacks in current detection technologies including, for example, relatively high costs, long enrichment steps and analysis times, and/or the need for extensive user training. Another advantageous feature provided by the systems and methods described herein includes fabrication in a relatively large scale. In some embodiments, the systems and methods may be used in conjunction with a detector including handheld detectors incorporated with, for example, smartphones (e.g., for the on-site detection of analytes such as pathogenic bacteria).

Immunosensors according to present embodiments combine a sandwich bioassay with an electrochemical surface plasmon resonance device for electrochemical detection of analytes from a sample, whereby a coated substrate for receiving an electroactive probe may be located in a flow cell, and the coated substrate comprises a first layer which is a silver (Ag) layer and a second layer which is a gold (Au) layer arranged so that the gold layer isolates the silver layer from an operating environment.

The present application relates sensing reactive components in fluids by monitoring band gap changes to a material having interacted with the reactive components via physisorption and/or chemisorption. In some embodiments, the sensors of the present disclosure include the material as a reactive surface on a substrate. The band gap changes may be detected by measuring conductance changes and/or spectroscopic changes. In some instances, the sensing may occur downhole during one or more wellbore operations like drilling, hydraulic fracturing, and producing hydrocarbons.

In one aspect of the present invention, a hydrogen occlusion body includes: a hydrogen occlusion layer containing a material whose optical property reversibly changes upon hydrogenation and dehydrogenation; and a catalyst layer containing a palladium-ruthenium alloy.

The invention relates to a testing system and related methods for detecting peritonitis or infection in peritoneal dialysate removed from a patient. The testing system can include a fluid sensor apparatus in a fluid line of a peritoneal dialysis cycler through which spent peritoneal dialysate can be pumped. The fluid sensor apparatus can detect one or more markers associated with peritonitis or infection.

A spa tub includes a spa shell configured to contain a volume of water; a circulation system configured to create a flow of the water to and from the spa shell; and a testing system configured to acquire water samples from the volume of water and to perform water quality tests on the water samples. The testing system includes a housing; a circulation pump disposed within the housing configured to acquire the water samples from the volume of water; a replaceable reagent cartridge removably received within the housing; and a water test assembly disposed within the housing. The water test assembly is configured to receive the water samples acquired by the circulation pump and a reagent from the reagent cartridge. The water test assembly is configured to mix the water samples and the reagent and to perform the water quality tests on the mixed water samples and reagent.

A hydrogen sensor and preparation method therefor, and a method for implementing hydrogen detection using the hydrogen sensor. The hydrogen sensor comprises an elastic substrate and a hydrogen sensitive material-based nanofilm positioned on the elastomeric substrate. The preparation method for the hydrogen sensor comprises the following steps: mixing a liquid elastomeric material and a curing agent, and uniformly stirring the mixture to obtain a mixed liquid, wherein the mass ratio of the liquid elastomeric material to the curing agent is 5:1-20:1; removing bubbles in the mixed liquid; drying and curing the mixed liquid in which bubbles are removed to obtain an elastomeric substrate; and depositing a hydrogen sensitive nanomaterial on the elastomeric substrate to form a hydrogen sensitive material-based nanofilm. The hydrogen sensor and the method for implementing hydrogen detection using the hydrogen sensor feature high sensitivity and simple production.

A hydrogen sensor and preparation method therefor, and a method for implementing hydrogen detection based on the hydrogen sensor. The hydrogen sensor includes an elastomeric substrate and a hydrogen sensitive material-based nanostructure positioned on the elastomeric substrate, the surface of the elastomeric substrate close to the hydrogen sensitive material-based nanostructure has a nanoarray structure, and the hydrogen sensitive material-based nanostructure and the nanoarray structure are complementary to each other. In addition, the present disclosure provides a preparation method for the hydrogen sensor and a method for implementing hydrogen detection based on the hydrogen sensor.