31results about "Investigating pH value" patented technology

Disclosed herein are devices, wound dressings and methods for determining the pH of fluid or a wound exudate at a wound. Example devices include a device comprising a surface configured to contact the fluid or wound and a pH indicator covalently bound thereto or applied to the surface, wherein the pH indicator has a first colour prior to contact with the fluid or the wound exudate and changes colour as a function of the pH of the fluid or wound exudate. Example devices include a device which indicates wound exudate loading within a wound dressing and wound dressing comprising an absorbent layer and a moisture indicator which indicates would exudate loading within the dressing, wherein the visibility of the moisture indictor changes as a result of a physical transformation of a first material within the dressing. Systems, devices, and methods are provided for monitoring wound status and progression by measuring pH levels indicated by pH-sensitive wound dressings. In some implementations, a wound is monitored by capturing an image of the pH-sensitive wound dressing and processing the captured image to determine the color of a pH indicator included on the wound dressing. The color of the indicator is determined in terms of RGB values from the image, and a pH value for the wound dressing is calculated from the dressing RGB values. The calculated pH value is then relayed to a user to be used as an indicator of wound status or health.

Visual indicating paste compositions are provided that are capable of producing a detectable color change upon contact with an aqueous liquid. The paste compositions include an indicator dye capable of changing color over a pH range of about 3 to about 11; an inorganic base capable of being converted to a more basic substance upon reaction with water; a liquid carrier (e.g., a polyalkylene glycol carrier); optionally, a gelling agent such as silica gel; and a proton donating compound such as a carboxylic acid or an organic sulfonic acid. When applied to a measuring probe, the paste compositions are particularly useful for detecting the level of water in the bottoms of tanks and delivery systems containing fuels such as gasoline by producing a clear, detectable color change upon contact with an aqueous liquid without bleeding or run-off. The paste compositions exhibit long shelf life and improved water resistance.

Described herein is a method of analyzing nutrient content in soil, the method comprising a) obtaining a soil sample, b) adding a liquid to the soil sample to form a soil slurry, c) flowing the soil slurry through a filter, whereby the filter is oriented such that the soil slurry flows downward through the filter at least partially under the effects of gravity, d) blending a reagent composition with the soil slurry to form a soil mixture, and e) measuring an absorbance of the soil mixture.

To provide a novel method for diagnosing a film for degradation which allows a more efficient and more secure determination of a degraded state of the film based on resin.SOLUTION: The present invention relates to a method for diagnosing a film based on resin for degradation to achieve the object, the method using an analysis technique B as a non-destructive method as described below: the analysis technique B is a technique of confirming the presence or absence of acid anhydride and a sign of a hydrolysis reaction in the film by Fourier transform infrared spectroscopy analysis.SELECTED DRAWING: Figure 1

Described herein is a method of analyzing nutrient content in soil, the method comprising a) obtaining a soil sample, b) adding a liquid to the soil sample to form a soil slurry, c) flowing the soil slurry through a filter, whereby the filter is oriented such that the soil slurry flows downward through the filter at least partially under the effects of gravity, d) blending a reagent composition with the soil slurry to form a soil mixture, and e) measuring an absorbance of the soil mixture.

The invention provides in the use of an indicator, to indicate the degree of depolymerisation, preferably the degree of biodegradation, of a degradable polymer in a polymer composition or an article made from said polymer composition. The invention further provides in a polymer composition comprising an indicator to indicate the degree of depolymerisation, and a method to visualise the degree of depolymerisation.

A multifunctional detection test paper includes a base and a plurality of test modules attached to the base. The base includes a base layer and a hydrophobic layer coated thereon, wherein the hydrophobic layer has a plurality of test zones spaced apart from each other. The test modules are provided on the test zones of the hydrophobic layer respectively to separate the test modules from the base layer, wherein each of the test modules includes a detection substance being configured to detect one of pH value, total alkalinity, cyanuric acid, total chlorine, bromine, free chlorine and water hardness when the test modules are immersed into water.

A diagnostic system for measuring inkjet printing system performance includes a printhead that deposits a colorless precoat solution from one or more of a plurality of ejector jets. The diagnostic system includes a diagnostic sheet, having a substrate, and a layer of material disposed on a first surface of the substrate, where the layer of material changes color after contacting the precoat solution, and an image scanner configured to capture a pattern on a surface of the diagnostic sheet after the precoat solution is deposited. The layer of material of the diagnostic sheet may include a moisture sensitive composition or a pH indicator. A method includes providing a diagnostic sheet to an inkjet printing system, where the diagnostic sheet may include a layer of material that changes color after contacting a precoat solution, and when needed, correcting one or more jetting operations.

A hydrogen sulfide test kit includes: a first reactant powder containing citric acid, a second reactant powder containing sodium bicarbonate, and a test paper that changes color upon contact with hydrogen sulfide. The first and second reactant powders are physically isolated from each other. A method of using the hydrogen sulfide test kit and a method of detecting hydrogen sulfide in an aqueous sample both include: reacting citric acid and sodium bicarbonate in the aqueous sample to form bubbles, said bubbles releasing any hydrogen sulfide in the aqueous sample into a gaseous form; if the released hydrogen sulfide in gaseous form is present, contacting said released hydrogen sulfide in gaseous form with the test paper; and detecting the presence of hydrogen sulfide in the aqueous sample based on the color of the test paper.

A multifunctional detection test paper includes a base and a plurality of test modules attached to the base. The base includes a base layer and a hydrophobic layer coated thereon, wherein the hydrophobic layer has a plurality of test zones spaced apart from each other. The test modules are provided on the test zones of the hydrophobic layer respectively to separate the test modules from the base layer, wherein each of the test modules includes a detection substance being configured to detect one of pH value, total alkalinity, cyanuric acid, total chlorine, bromine, free chlorine and water hardness when the test modules are immersed into water.

Described herein is a method of analyzing nutrient content in soil, the method comprising a) obtaining a soil sample, b) adding a liquid to the soil sample to form a soil slurry, c) flowing the soil slurry through a filter, whereby the filter is oriented such that the soil slurry flows downward through the filter at least partially under the effects of gravity, d) blending a reagent composition with the soil slurry to form a soil mixture, and e) measuring an absorbance of the soil mixture.

A medical instrument processor includes an enclosure, a liquid distribution system, and a disinfectant concentration measuring subsystem. The enclosure is configured to hold a medical instrument. The liquid distribution system is configured to deliver a disinfection solution to a medical instrument within the enclosure. The liquid distribution system has a liquid outlet. The disinfectant concentration measuring subsystem includes a first mixing chamber in fluid communication with the liquid outlet, a pump that is configured to simultaneously pump the disinfection solution and the reagent solution into the first mixing chamber, and a concentration analysis assembly that is operable to determine a concentration of disinfectant in a sample solution that is output from the first mixing chamber. The reservoir is in fluid communication with the first mixing chamber.

The invention relates to a measuring device for quantitative chemical analysis that uses a conveying unit. This conveying unit is connected via a multi-way valve to a sample container, a measuring container, and at least one reagent container. A reagent is conveyed by the conveying unit from the reagent container to the measuring container, which contains a sample. A sensor that detects a transition point is attached to the measuring container. The device can additionally be connected to a waste container. A method for using this device comprises drawing up the sample, adding it to the measuring container, and measuring the transition point.

Described herein is a method of analyzing nutrient content in soil, the method comprising a) obtaining a soil sample, b) adding a liquid to the soil sample to form a soil slurry, c) flowing the soil slurry through a filter, whereby the filter is oriented such that the soil slurry flows downward through the filter at least partially under the effects of gravity, d) blending a reagent composition with the soil slurry to form a soil mixture, and e) measuring an absorbance of the soil mixture.

The present invention provides the use of an indicator for indicating the degree of depolymerization, preferably biodegradability, of a degradable polymer in a polymer composition or an article made from the polymer composition. The present invention further provides a polymer composition comprising an indicator for indicating the degree of depolymerization, and a method for visualizing the degree of depolymerization.

The invention discloses a natural ester insulating oil aging detection method and device and a computer program product, and the method comprises the steps: S1, synchronously obtaining aging indication data of natural ester insulating oil on line; s2, carrying out standardization processing on the aging indication data and extracting key feature parameters; s3, inputting the key characteristic parameters into an aging evaluation model trained by a deep neural network, and outputting the aging probability and risk level of the oil sample; and S4, an early warning or oil change instruction is triggered according to the risk level and a preset threshold value. According to the invention, early warning and oil change instruction triggering can be carried out in advance without power failure, so that the operation reliability and the maintenance economy are obviously improved.

The present invention is in the field of chromium VI test, a chromium VI tester, a test kit comprising said chromium VI tester, and in particular to identify low amounts of chromium VI, such as in coatings and paints, which low amounts may form a health risk and may be toxic.

The present invention relates to systems and methods for determining fluid quality. The system includes a sensing device. The sensing device includes an outer housing and an inner housing inserted within the outer housing. The sensing device includes a plurality of sensors configured to detect one or more parameters related to a fluid stored in a receptacle and ambient parameters of the receptacle. The sensing device further includes a control circuitry configured to generate sensory data based on the parameters related to the fluid and the ambient parameters of the receptacle.Further, the system includes a central control module. The central control module predicts, by one or more Artificial Intelligence (Al) models, the fluid quality of the fluid stored in the receptacle basedon the sensory data. The Al models predict the fluid quality of the fluid based onmapping the sensory data with the set of predefined fluid quality profiles.

A system for monitoring the alkalinity of a treatment liquid in a treatment tank includes a reaction tank; an indicator burette which drops an indicator into the reaction tank; a reagent burette which drops an acidic reagent into the reaction tank; a probe-type absorptiometer to be inserted into the reaction tank; a measuring device which analyzes the transmittance of a solution detected by the absorptiometer to calculate the alkalinity; a first system that collects the treatment liquid from the treatment tank for storing and supplies the treatment liquid to the reaction tank; a control device which controls the operation of the first system so as to supply the treatment liquid to the reaction tank, outputs a completion signal to the measuring device, and controls a discharge system so as to discharge the treatment liquid in the reaction tank, when the calculation of alkalinity by the measuring device is completed.

Described herein is a method of analyzing nutrient content in soil, the method comprising a) obtaining a soil sample, b) adding a liquid to the soil sample to form a soil slurry, c) flowing the soil slurry through a filter, whereby the filter is oriented such that the soil slurry flows downward through the filter at least partially under the effects of gravity, d) blending a reagent composition with the soil slurry to form a soil mixture, and e) measuring an absorbance of the soil mixture.

A measuring device for quantitative chemical analysis uses a conveying unit connected to a sample container, a measuring container, and at least one reagent container via a multiple valve. A reagent is conveyed by the conveying unit from the reagent container into the measuring container, which contains a sample. A sensor that detects a transition point is attached to the measuring container. The device can also be connected to a waste container. One method of using this device involves drawing the sample, adding it to the measuring container, and measuring the transition point.

The colorimetric indicator 5 includes a UV radiation-driven acid releasing agent, a pH indicator that changes color between the deprotonated form and the acid form, a proton scavenger, and a UV stabilizer.

The invention relates to methods for measuring the acidity of aqueous solutions. These methods are capable of measuring the total acidity of aqueous solutions containing a strong acid or a mixture of strong acids, and, if the solution contains one or more hydrolysable cations, the free acidity as well. Applications: any industrial and scientific research field where it can be necessary to measure the total acidity or the free acidity of aqueous solutions of strong acids.

The invention relates to a pH-responsive composition and a use thereof. Described herein are pH-responsive compounds, micelles, and compositions useful for the detection of primary and metastatic tumor tissue. The compounds described herein are imaging agents useful for the detection of primary and metastatic tumor tissues, including lymph nodes. Real-time fluorescence imaging during surgery helps a surgeon to detect metastatic lymph nodes or depict tumor tissue relative to normal tissue, with the goal of achieving negative marginal incision and complete tumor resection.

Described herein is a method of analyzing nutrient content in soil, the method comprising a) obtaining a soil sample, b) adding a liquid to the soil sample to form a soil slurry, c) flowing the soil slurry through a filter, whereby the filter is oriented such that the soil slurry flows downward through the filter at least partially under the effects of gravity, d) blending a reagent composition with the soil slurry to form a soil mixture, and e) measuring an absorbance of the soil mixture.

A method is provided for the selective measurement and monitoring of multiple base chemicals in a processing solution. The method includes providing a processing solution containing multiple base chemicals and performing a first analytical method, such as measuring the conductivity of the solution mixture, in combination with a second analytical method, such as titrating or measuring pH of the solution. From such measurements, the concentration of one or more base chemicals can be selectively determined. In such a method, multiple bases in the same processing solution can be advantageously selectively and accurately measured and monitored.

Described herein is a method of analyzing nutrient content in soil, the method comprising a) obtaining a soil sample, b) adding a liquid to the soil sample to form a soil slurry, c) flowing the soil slurry through a filter, whereby the filter is oriented such that the soil slurry flows downward through the filter at least partially under the effects of gravity, d) blending a reagent composition with the soil slurry to form a soil mixture, and e) measuring an absorbance of the soil mixture.