10 results about "Indophenol" patented technology

The invention relates to a carbamate pesticide residue rapid detection non-woven fabric and a preparation method thereof, the carbamate pesticide residue rapid detection non-woven fabric comprises an outer package, the outer package is internally provided with an enzyme-containing cloth, a water-soluble film, an indigo-containing cloth, a color-developing cloth, a flash-evaporation non-woven fabric and a warm paste, and the enzyme-containing cloth, the water-soluble film, the indigo-containing cloth, the color-developing cloth, the flash-evaporation non-woven fabric and the warm paste are stacked and connected from top to bottom. The preparation method comprises the following steps: dipping pure cotton spunlaced non-woven fabric in a cholinesterase gelatin solution, taking out and airing to obtain enzyme-containing fabric, dipping the pure cotton spunlaced non-woven fabric in an indophenol acetate solution, taking out and airing to obtain indigo-containing fabric, and drying to obtain the indigo-containing fabric. The enzyme-containing cloth, the water-soluble film, the indigo-containing cloth, the color-developing cloth, the flash-evaporation-method non-woven cloth and the warm paste are mutually connected and put into an outer package, and finally the interior of the outer package is vacuumized to obtain the quick-test non-woven cloth. The method is simple and convenient to operate, high in detection speed and high in detection result accuracy.

The invention discloses a kit for detecting the beef cattle nutrition metabolite level and application thereof, and belongs to the technical field of animal husbandry detection.The kit for detecting the beef cattle nutrition metabolite level comprises a urease-indophenol method kit or a Beckmann Coulter method kit used for detecting urea nitrogen in beef cattle blood. The invention also discloses a non-esterified fatty acid detection kit for detecting energy factors in beef cattle blood. According to the invention, beef cattle metabolites such as beef cattle blood urea nitrogen and blood energy factors can be rapidly detected, and the nutritional status of beef cattle can be evaluated by effectively detecting symbolic metabolites such as urea nitrogen and energy factors existing in blood related to the health and nutrition level of beef cattle; feed raw material and formula adjustment can be performed for feeding management, body condition scoring and the like of beef cattle in different periods, so that the feed can be widely applied to animal husbandry and beef cattle industry.

This invention relates to the field of medical device testing technology, specifically to the application of LC-MS / MS in determining the content of indophenol sulfate and p-cresol sulfate in a hemoperfusion device. The method includes: mixing plasma and acetonitrile, vortexing and centrifuging, collecting the supernatant, eluting the supernatant through a C18 solid-phase extraction column, collecting the eluent, mixing the eluent with water and filtering to obtain the test solution; performing liquid chromatography and mass spectrometry on the test solution, wherein the mobile phase A of the liquid chromatography is a 3-8 mmol / L gradient concentration ammonium acetate solution containing 0.05% ammonium formate by volume, and the mobile phase B is methanol; S3: calculating the concentrations of indophenol sulfate and p-cresol sulfate in the test solution based on the labeled curve. This invention, through dual purification pretreatment and multi-ion-pair threshold matching technology, can effectively remove more than 95% of interfering protein-binding toxoids. The interference peak response value in blank plasma is less than 5% of the target analyte response value, solving the detection error problem caused by interference in traditional methods.

This invention relates to a method for detecting indophenol sulfate based on surface-enhanced Raman spectroscopy. A liquid containing the indophenol sulfate to be detected is mixed with an oxidizing reagent to specifically oxidize the indophenol sulfate to indigo, yielding a mixed solution. This mixed solution is then mixed with gold nanoparticles, and the spectra of the mixed solution are acquired using a confocal Raman microscope. The acquired Raman spectra are baseline-removed to obtain the signal intensity at the target characteristic peak. Based on standard curves for different concentrations of indophenol sulfate and the signal intensity of the sample, the concentration of indophenol sulfate in the test sample is determined. This invention provides clear detection signals, accurate resolution, and a simple operation, enabling rapid and accurate detection of indophenol sulfate concentration in samples (such as serum). It is expected to promote research on the biological mechanisms of indophenol sulfate and its large-scale clinical application.

This invention relates to the field of indophenol sulfate and p-cresol sulfate technology, and particularly to a method for determining the concentrations of indophenol sulfate and p-cresol sulfate in plasma. The method involves pretreating the sample, followed by determination of the concentrations of indophenol sulfate and p-cresol sulfate in the sample using liquid chromatography-mass spectrometry and an internal standard method. The sample includes plasma, and the pretreatment involves protein precipitation. This method exhibits good linearity, a low limit of quantitation, strong anti-interference capabilities, and high precision and accuracy.

A non-woven fabric for rapidly detecting organophosphorus pesticide residues comprises an enzyme-containing fabric, a water-soluble film, an indigo-containing fabric, a color-developing fabric and a flash-evaporation non-woven fabric, the enzyme-containing fabric and the indigo-containing fabric are respectively pure-cotton spunlace non-woven fabrics carrying cholinesterase and indophenol acetate, the color-developing fabric is a non-woven fabric, and the flash-evaporation non-woven fabric is a non-woven fabric. The top surface of the flash-evaporation-method non-woven fabric is connected with the bottom surfaces of the indigo-containing fabric and the color-developing fabric which are arranged side by side, the parts, except the indigo-containing fabric and the color-developing fabric, on the flash-evaporation-method non-woven fabric are connected with the four edges of the water-soluble film, and the top surface of the water-soluble film is connected with the bottom surface of the enzyme-containing fabric. The preparation method comprises the following steps: firstly, putting pure cotton spunlaced non-woven fabric into a cholinesterase gelatin solution for dipping and airing to obtain enzyme-containing cloth, then putting the pure cotton spunlaced non-woven fabric into an indophenol acetate solution for airing to obtain indigo-containing cloth, and finally compounding the cloth together according to a connecting structure between the cloth and the cloth to obtain the quick-test non-woven fabric. According to the design, the simplicity and the convenience are better, and the detection time is shorter.

The present invention concerns the use of light to convert indicant to indigo. The invention is particularly useful in dyeing textiles from indican by simple light exposure, thereby providing a greener alternative to current industrial processes for colored fabrics and other products.

The invention discloses a preparation method of an indophenol derivative, and belongs to the technical field of preparation of blue indophenol dye compounds. Ni / TiO2 is creatively used as a photocatalyst, sodium chloride is used as a chlorine source, chlorination of a phenol compound is completed, reductive amination of a nitrophenol compound is completed through photocatalysis of CdS quantum dots, and the indophenol derivative is obtained. The KF / Al2O3 solid base with better cycle performance is subsequently used for catalyzing the reaction to successfully prepare the indophenol derivative; the synthetic route and process are simple, the conditions are mild, the high-yield and high-purity product is obtained while the preparation cost is reduced, and better reaction advantages and economic advantages are shown.

An apparatus and method for determining the presence or amount of monochloramine and / or ammonia. The devices and methods utilize an electrochemical sensor that includes a working electrode, a reference electrode, and a counter electrode. The working electrode is coated with a formulation specifically for the analysis of monochloramine and / or ammonia comprising reagents associated with the Berthelot reaction to produce an indophenol product for electrochemical detection by voltammetry, in particular differential pulse voltammetry.

The invention discloses a method for determining the content of red light impurities in a paracetamol raw material medicine. The method comprises the following steps: (1) preparing a solution: (1.1) preparing a diluent with the pH value of 11-14 from alkali and pure water; (1.2) preparing a contrast solution of the red light impurity indophenol by using a diluent; (1.3) preparing a test solution by using a diluent; (2) setting detection conditions: detecting by adopting an ultraviolet and visible spectrophotometer; the spectrum scanning range is that spectrum scanning is carried out in the range of 200-800 nm, and the maximum absorption wavelength of indophenol is 629 nm + / -3 nm; (3) respectively measuring the contrast solution and the test solution under the spectrum condition in the step (2) to obtain absorbance values of the contrast solution and the test solution; and (4) calculating the content of the red light impurity indophenol in the test sample through a reference substance comparison method. The method disclosed by the invention can be used for rapidly, accurately and stably measuring the content of the red light impurity indophenol in paracetamol.