The present disclosure relates to a measuring arrangement for measuring an ozone content in a measured medium, including: a first sensor surface and a second sensor surface; a first cover element adjacent the first sensor surface and including an ozone binder that binds ozone without releasing oxygen or any species further reacting to form oxygen; a second cover element adjacent the second sensor surface and including an ozone converter that reacts with ozone to form oxygen; a measuring sensor configured to generate a first measurement signal dependent on the oxygen concentration at the first sensor surface and a second measurement signal dependent on the oxygen concentration at the second sensor surface; and an electronic evaluation unit configured to determine the ozone content in the measured medium based on the first and the second measurement signals.

A measuring method for measuring dissolved oxygen includes performing a first measurement sequence, including: emitting a first stimulation signal onto a sensor for a first period; detecting a first detection signal; determining a phase shift between the first stimulation signal and the first detection signal; and calculating a first measured value based on the determined phase shift. Performing a second measurement sequence, including a second stimulation signal onto the sensor for a second period, wherein the second stimulation signal is different than the first stimulation signal; detecting a second detection signal; determining a decay time of the second detection signal; calculating a second measured value based on the decay time. The method further includes comparing the first measured value to the second measured value and correcting the first measured value when a difference between the first measured value and the second measured value is greater than a first limit value.

The present invention provides a method for detecting and assaying Clostridium neurotoxins and identification of serotypes of botulinum neurotoxins in various food matrices and clinical samples. This method is also used for detection of BoNT inside the neuronal and epithelial cells. The method comprises detecting and assaying the presence of a Clostridium neurotoxin in a sample by: exposing the sample containing a Clostridium neurotoxin to a sample comprising a novel SNAMPXIN/SNAMP universal recombinant substrate fusion protein capable of producing a detectable FRET, following cleavage; detecting and assaying the presence of the Clostridium neurotoxin by measuring a change in the energy transfer or the luminescence signal; and detecting and assaying an electrophoretic mobility pattern of one or more cleaved protein bands or a degraded protein, using a high throughput automated system to identify the different serotypes of the Clostridium neurotoxin. SNAMPXIN/SNAMP is formed from parts of BoNT substrates SNAP-25 and VAMP.

A method for analyzing a gaseous pollutant by means of a microfluid circuit includes a means for pumping a liquid and a means for trapping a gas, comprising the following steps: a) generating a flow of a liquid, the liquid comprising a selective derivative agent; b) trapping and dissolving gaseous pollutant in the flow; c) reaction of the pollutant with the selective derivative agent so as to form a liquid derivative compound; d) measuring the concentration of liquid derivative compound and determining the concentration of gaseous pollutant.

The disclosure provides an integrated circuit (IC) structure with fluorescent materials, and related methods. An IC structure according to the disclosure may include a layer of fluorescent material on an IC component. The layer of fluorescent material defines a portion of an identification marker for the IC structure.

High photoluminescence, high stability, inorganic perovskite compounds comprising an alkali metal selected from potassium (K), rubidium (Rb), and cesium (Cs); copper (Cu); and at least one halogen selected from chlorine (Cl), bromine (Br), and iodine (I). The perovskites may be free of lead (Pb). The inorganic perovskite compound may be used in an optoelectronic device. The optoelectronic device optionally contains a phosphor such as a blue-emitting phosphor. The inorganic perovskite compound may be used as an anti-counterfeiting nanotaggant applied on or within an object that susceptible to counterfeiting to enable confirmation of an authentic object.

An embodiment provides a method for measuring total chlorine in a solution, including: preparing a thiocarbamate indicator; introducing the thiocarbamate indicator to a solution, wherein the solution contains an amount of monochloramine; adding an additive to the solution, wherein the additive accelerates the reaction rate between the thiocarbamate indicator and monochloramine and causes a change in fluorescence of the solution; and measuring the amount of monochloramine in the solution by measuring an intensity of the fluorescence. Other aspects are described and claimed.

In-situ fluorimeters and methods and systems for collecting and analyzing sensor data to predict water source contamination are provided. In one embodiment, a method is provided that includes receiving sensor data regarding a water source. Changepoints may then be calculated within the sensor data and the sensor data may be split into intervals at the changepoints. A machine learning model may then be used to classify the intervals and a predicted contamination event for the water source may be identified based on the classified intervals. In another embodiment, an in-situ fluorimeter is provided. The in-situ fluorimeter comprises one or more UV LEDs centered around a pre-set excitation wavelength (e.g., a TLF excitation wavelength), a bandpass filter, a lens, a photodiode system, a machine learning platform; and an alarm triggered by contamination events, wherein the alarm is calibrated through the machine learning system.

The present disclosure provides a ratiometric fluorescent probe, a preparation method thereof, and an application in detection of hydrogen peroxide. In the present disclosure, MoO.sub.x QDs (nanoenzymes) and Co/Zn-MOFs both have catalytic activity, and the large specific surface area and porous structure of Co/Zn-MOFs can provide more binding sites for the contact between nanoenzymes and substrates. Moreover, Co/Zn-MOFs have high catalytic activity similar to natural enzymes. When nanoenzymes with fluorescent properties encounter Co/Zn-MOFs with similar catalytic activity, they will collide with a spark of “synergy catalysis”, and the fusion of the two plays a role of synergy catalysis; in addition, the uniform cavity of Co/Zn-MOFs can provide “hosts” for nanoenzymes, and Co/Zn-MOFs provide “anchors” for MoO.sub.x QDs, avoiding the aggregation of MoO.sub.x QDs and enhancing the stability of the probe.

The present disclosure relates to probes for analyzing a chemical composition, and related methods of analyzing a chemical composition and of manufacturing probes for analyzing a chemical composition. A benefit of the disclosed probes and methods can include luminescent chemical sensor arrays for rapid, accurate, portable and economical qualitative and quantitative analysis of a broad range of chemical compositions. A benefit of the methods disclosed herein can include the rapid, simple, and accurate analysis of trace chemicals present in chemical compositions.