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33 results about "Associated substance" patented technology

Method and kit for detecting various related substance of CAH at same time

The invention discloses a method and a kit for detecting various related substance of CAH at the same time. The method is used for detecting 17 alpha progesterone, androstenedione, 11-deoxycortisol, 21-deoxycortisol and cortisol at the same time. The method includes: (1), adding an organic solvent into a mixed internal standard product to prepare a stock solution, and diluting to obtain extractionworking liquid; (2), using the extraction working liquid to incubate a to-be-detected blood spot sample; (3), centrifuging, taking supernate, concentrating, and using 45% methanol for re-dissolving;(4), using LC-MS / MS to detect a re-dissolving product, wherein the mixed internal standard product includes isotope internal standard products of 17 alpha progesterone, androstenedione, 11-deoxycortisol, 21-deoxycortisol and cortisol. The method can quantify five hormones in one time, can provide specific, sensitive, low-false positive and high-positive-prediction-value CAH screening and can screen CAH of 11-OHD and 21-OHD at the same time, thereby improving screening efficiency and quality.
Owner:SHENZHEN HUADA GENE INST

High performance liquid chromatography detection method for hydroxyiminobarbituric acid and related matters thereof

The invention provides a method for determining contents of hydroxyiminobarbituric acid and related impurities of cyanoacetic acid, dimethylurea, dimethylacetamide and dimethyl 4AU(dihydrogen-6-imino-1,3-dimethylurea pyrimidine). A reverse high performance liquid chromatography peak area normalizing type quantitative analysis method is utilized, and adopts the chromatography conditions that a chromatography column is Phenyl C19 column; the length of the column is 150 to 250mm, the inner diameter of the column is 4.0 to 4.6mm, and the particle size of filler is 3.5 to 5mu m; the flow rate is 0.9 to 1.1ml/min; the detection wavelength is 205nm; the temperature of the column is 27 to 33 DEG C; the sample feeding amount is 20mul; the flowing phase comprises a 0.2% (V/V) triethylamine water solution A and acetonitrile B, the pH (potential of hydrogen) value of the 0.2% (V/V) triethylamine water solution A is adjusted to 2.8 to 3.2 by phosphoric acid, and the ratio of A to B is (96 to 98):(2to 4)(V/V). The method has the advantages that the product quality is conveniently controlled in the production and quality control process; the cost is low, the operation is simple, the implementingis easy, the accuracy and precision are high, and the stability and reproducibility are good.
Owner:XINHUA PHARM (SHOUGUANG) CO LTD

Method and apparatus for automatic calibration of spectrometers in chemometry by means of a bayes iterative estimation method

An apparatus and also a method for calibration of a spectrometer for the measurement of spectral fractions of a substance (4) as a part of chemometry or chemometric processes are proposed, with a spectrometer device (1) for measuring of spectral fractions of the substance (4) to be analysed, and also with a calibration unit (2) used to carry out a calibration of the spectrometer device and / or of the measured data on the basis of measured spectrometric data, characterized by the following steps: a) measuring the totality of spectral fractions X and / or of associated substance concentrations of the substance (4) under analysis; b) Saving the totality of measured spectral fractions X in a memory module (3) as spectrometric measured data in the form of a multi-dimensional coefficient vector; c) From the totality of measured spectral fractions X, automatic extraction of spectral fractions Xrel physically relevant to the particular measuring process by means of an automatically running, iterative estimation method saved in the calibration unit (2); d) Calibration of the measured spectrometric data for the analysed substance (4) on the basis of spectral fractions Xrel of the spectrometric data extracted in step c) and which are physically relevant to the substance (4) under analysis.
Owner:ENDRESS HAUSER CONDUCTA GESELLSCHAFT FUER MESS UND REGELTECHNIK MBH CO KG

Method and apparatus for automatic peak integration

PendingCN114207435AReliable automatic peak integrationParticle separator tubesComponent separationAnalyteAssociated substance
A computer-implemented method for automatic peak integration of at least one chromatogram of at least one sample is presented. The sample comprises at least one analyte and at least one chemically related substance. The method comprises the steps of: a) retrieving at least one chromatogram of the chemically related substance and at least one chromatogram of the analyte; (114, 116) b) evaluating the chromatogram of the chemical related substance, wherein the evaluation comprises b1) determining a retention time (118) of the chemical-related substance and adding the retention time of the chemical-related substance to a predetermined or predefined constant offset and / or multiplying the retention time of the chemical-related substance by a predetermined or predefined constant factor (120), b) determining at least one initial value (117) of the analyte retention time by determining a peak shape parameter (121) of at least one peak of the chromatogram of the chemically relevant substance, b2) determining at least one initial value (122) of an analyte peak shape parameter by determining a peak shape parameter (121) of at least one peak of the chromatogram of the chemically relevant substance; c) evaluating the chromatogram of the analyte, where the evaluation comprises c1) at least one step (124) of position determination, where the analyte retention time is determined by taking into account the initial value of the retention time of the chemically relevant substance; c2) at least one peak integration step (126) in which at least one fitting analysis is applied to the chromatogram of the analyte by taking into account an initial value of an analyte peak shape parameter and the analyte retention time, thereby determining an analyte peak area and an analyte peak shape.
Owner:F HOFFMANN LA ROCHE & CO AG
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